Night sky October 2026 — What to look for in the sky this month

The night sky tonight and on any clear night offers an ever-changing display of fascinating objects you can see, from stars and constellations to bright planets, the moon, and sometimes special events like meteor showers.

Observing the night sky can be done with no special equipment, although a sky map can be very useful, and a good telescope or binoculars will enhance some experiences and bring some otherwise invisible objects into view.

You can also use astronomy accessories to make your observing easier, and use our Satellite Tracker page powered by N2YO.com to find out when and how to see the International Space Station and other satellites. We also have a helpful guide on how you can see and track a Starlink satellite train.

You can also capture the night sky by using any of the best cameras for astrophotography, along with a selection of the best lenses for astrophotography.

Monthly sky watching information is provided to Space.com by Jules-Pierre Malartre of Starry Night Education, the leader in space science curriculum solutions. Follow Starry Night on X @StarryNightEdu.

Editor's note: If you have an amazing skywatching photo and would like to share it with Space.com's readers, send your photo(s), comments, and your name and location to spacephotos@space.com.

Calendar of observing highlights

Thursday, Oct. 1 — Moon at perigee

The month kicks off with the waning gibbous moon reaching perigee at a distance of 369,334 km.

While stargazers usually hunt for targets right along the terminator for dramatic shadows, the direct sunlight over the 85-kilometer-wide crater Tycho makes perigee the perfect time to observe its massive ray system. Because Tycho sits far from the terminator tonight, the high sun angle washes out topographical depth but brilliantly illuminates the streaks of bright, pulverized rock ejected during its violent formation.

Even small telescopes and binoculars will easily reveal the brilliant white splashes radiating outward like spokes on a wheel across the southern highlands. Observers using larger telescopes can push the magnification to trace these intricate rays for hundreds of miles across the lunar surface and hunt for the irregular, asymmetrical secondary craters created by falling massive debris.

Astrophotographers can capture this prominent feature using a DSLR camera on a standard tripod or a smartphone directly held to the eyepiece, utilizing a fast shutter speed to avoid overexposing Tycho's intensely bright core.

To comfortably explore the fully illuminated portions of the disk without eye fatigue, thread a variable polarizing filter onto your eyepiece to dial back the glare and improve the contrast of the delicate ejecta rays.

Friday, Oct. 2 — Comet 161P/Hartley-IRAS Closest Approach

Comet 161P/Hartley-IRAS reaches its closest approach to Earth today, passing at a distance of roughly 75.5 million kilometers (0.505 AU).

While it remains far too dim for the naked eye at an expected magnitude of 13.6, firing up a reliable planetarium app or star-charting software (such as SkySafari or Starry Night) will help you pinpoint its precise location among the autumn constellations.

Because of its faintness, a telescope with at least an 8-inch aperture — such as a standard Newtonian or Schmidt-Cassegrain — is recommended to gather enough light to resolve its fuzzy coma against the background sky.

Astrophotographers with a DSLR camera on a tracking mount can take multiple 30-second exposures to stack later for an improved signal-to-noise ratio, capturing details that the eye alone cannot perceive.

When hunting for faint comets visually, always use averted vision by looking slightly off to the side of the target to engage your eye's most sensitive light receptors.

Saturday, Oct. 3 — Saturn at its best

Saturn commands the spotlight this weekend. While the exact moment of opposition technically occurs on Sunday, Oct. 4 at 8:00 a.m. EDT (1200 GMT), the bright morning sky means your absolute best viewing window is actually the night of Saturday, Oct. 3 into the predawn hours of Oct. 4.

Rising in the east as the sun sets, it will be visible all night long as a steady, yellowish point of light to the naked eye. Binoculars will only reveal an elongated shape, but a small 3- or 4-inch telescope will cleanly resolve the rings. Modest equipment will also reveal its largest and brightest moon, Titan, glowing at magnitude 8.5.

Stepping up to a medium 6- to 8-inch Schmidt-Cassegrain or Newtonian reflector will resolve the dark gap of the Cassini Division within the rings, spot subtle pastel banding on the planet's globe, and pull in a cluster of fainter moons like Rhea, Tethys, and Dione.

Observers using large-aperture instruments of 10 inches or more can even hunt for elusive Enceladus much closer to the glare of the rings.

This is the prime window for astrophotographers to use a dedicated planetary camera and a Barlow lens to shoot high-framerate video, stacking the clearest frames in software to slice through atmospheric turbulence for a stunning final image. No matter your equipment, always wait until local midnight when Saturn reaches its highest point in the southern sky, as looking through the thinnest possible layer of our atmosphere dramatically sharpens the view.

Sunday, Oct. 4 — The moon meets the Twins (predawn)

Late tonight and into the early morning hours, the waning moon will rise in the northeast, acting as a brilliant celestial guidepost to the constellation Gemini. It will position itself near the constellation's two brightest stars, Castor and Pollux, creating a striking naked-eye alignment. While they are famously referred to as twins, these two stars are entirely different astrophysical objects.

Pollux, the slightly brighter star of the pair, shines with a distinct golden-orange hue; it is an evolved giant star and holds the title of the brightest star in our night sky known to host an exoplanet.

Castor, on the other hand, glows with a crisp white light. While it appears as a single point of light to the unaided eye, aiming a small telescope at Castor with high magnification reveals a beautiful, tight double star—which is actually just the brightest component of a complex, gravitationally bound six-star system.

Grab a pair of binoculars to enjoy the color contrast between the two stars using the moon as your anchor and welcome the early arrival of the prominent winter constellations returning to the late-night sky.

Monday, Oct. 5 — Mars conjunction and Jupiter's shadows (predawn)

Early risers and night owls are treated to a blockbuster celestial double feature this morning.

The action kicks off with a dramatic encounter between a waning crescent moon and Mars. For observers positioned in extreme northern latitudes — such as northernmost Alaska and eastern Russia — the moon will pass directly in front of the Red Planet in a true lunar occultation, though it will hang low on the horizon.

For the rest of North America, including the East Coast, it will manifest as a breathtakingly close conjunction where the two solar system bodies will be only 1.2 degrees apart. Your view will vastly improve by waiting until 2:00 a.m. or later, once the two solar system bodies have climbed higher above the turbulent, image-distorting atmosphere near the horizon.

Once you have taken in the Red Planet, swing your telescope toward Jupiter for a spectacular double shadow transit of Europa and Callisto. Beginning right around 3:27 a.m. EDT (0727 GMT) , the small, razor-sharp shadow of Europa glides across the cloud tops alongside the larger, more diffuse silhouette of Callisto.

Catching these two black dots moving simultaneously across the planet's banded disk is a phenomenal reward for medium-to-large telescope users, offering a striking visual contrast that highlights the distinct personalities of Jupiter's Galilean moons. Grab an extra cup of coffee — this is one early-morning wake-up call you won't want to miss.

Tuesday, Oct. 6 — Lunar occultation of Jupiter (predawn)

Following yesterday's planetary double feature, the cosmic show continues with another breathtaking early-morning spectacle. The moon pays a close visit to Jupiter, culminating in a dramatic lunar occultation visible across much of North America. For observers in the Northeast, including Montreal and New York City, the predawn hours are great seats for this celestial mechanics spectacle.

Watch as the bright eastern edge of the moon glides smoothly in front of the gas giant, slowly swallowing it. With the occultation's midpoint occurring around 4:50 a.m. EDT, and after a brief period of total disappearance behind the lunar disk, Jupiter makes a stunning reappearance just around 5:30 a.m. Binoculars or a small telescope will offer a crystal-clear view of the planet popping back out into the morning twilight—an unforgettable wake-up call that rounds out an already stellar week of stargazing.

For photographers, this alignment offers a wonderful canvas, though capturing it comes with its own unique set of challenges. To catch the event on a phone, use a steady tripod adapter, tap to lock your focus on the moon, and drag the exposure slider down to prevent the lunar surface from blowing out into a pure white glare against the dark sky. Those with DSLR cameras or dedicated planetary cameras mounted to a tracking scope can capture a breathtaking sequence of images showing Jupiter sliding past the lunar mountains.

As veteran observers often remind us, witnessing a planet vanish into the silent shadow of the moon is a humbling reminder of our place in the cosmic machinery: "To watch the infinite dance of the cosmos from our own backyard is to realize that the universe is never truly asleep."

Wednesday, Oct. 7 — Look out for Zodiacal light & Regulus close to the moon

Starting today and lasting for the next two weeks, observers in northern latitudes have a prime opportunity to spot the Zodiacal Light in the eastern sky roughly 90 minutes before morning twilight. This ghostly, pyramid-shaped glow is created by sunlight reflecting off interplanetary dust scattered along the plane of the solar system.

It requires exceptionally dark, moonless skies and is best appreciated with the naked eye or wide-field binoculars, as telescopes restrict the field of view far too much. Earlier in the morning, at 04:00 GMT, the bright star Regulus passes 0.6 degrees north of the waning crescent moon, resulting in an occultation for observers in extreme southern locations and most of eastern and southern Africa.

Astrophotographers chasing the zodiacal light will need a wide-angle lens (14 mm to 24 mm) on a sturdy tripod set to a fast f/2.8 aperture, exposing for 15 to 20 seconds at a high ISO to capture the faint, ethereal wedge of light. To give yourself the best chance of spotting it visually, drive far away from city light pollution and allow your eyes a full 30 minutes to dark-adapt, avoiding any use of white flashlights or cell phone screens.

Thursday, Oct. 8 — Draconid meteor shower peak

The skies offer a double atmospheric treat tonight, starting with the peak of the Draconid meteor shower. Unlike many showers that require you to stay up past midnight, the Draconids peak best in the early evening hours, as the constellation Draco rides high in the northern sky. To track down the radiant, point your binoculars or gaze toward the head of the dragon, nestled right near the bright twin stars Eltanin and Rastaban (the "Dragon's Eyes"). While the Draconids are a modest shower, typically yielding only a handful of slow-moving meteors per hour, they occasionally surprise observers with sudden outbursts. Best of all, with a razor-thin waning crescent moon sitting at just 3% to 5% illumination and well out of the way, moonlight interference is entirely a non-issue.

If you venture back outside during the deep predawn hours, use the dark, moon-free window to pivot your gaze toward a very different kind of celestial spectacle: the Zodiacal Light. As the autumn viewing window opens, step away from urban light pollution about 90 minutes before sunrise (roughly 5:00 a.m. to 5:30 a.m. local time) and look low toward the eastern horizon. You just might catch a faint, ethereal pyramid of silvery-white light stretching upward along the plane of the ecliptic—a ghostlike "false dawn" caused by sunlight reflecting off ancient interplanetary dust grains drifting between the planets.

Friday, Oct. 9 — The Great Square of Pegasus

As the autumn nights grow longer, one of the most prominent asterisms of the season takes center stage in the eastern evening sky: the Great Square of Pegasus. Formed by four stars of roughly equal brightness — Markab, Scheat, Algenib, and Alpheratz — this massive stellar diamond serves as the perfect anchor for navigating the fall sky.

Because the space inside the square appears largely devoid of bright stars, the shape stands out distinctly against the dark background. To the naked eye, it looks like a giant baseball diamond pitched high above the eastern horizon after dark. Once you can identify the Great Square, you can use it as a cosmic signpost: The Star Alpheratz in the top-left corner is your starting point for tracing the constellation Andromeda, while the right side of the square points straight down toward Fomalhaut, the bright, lonely autumn star low in the south.

Saturday, Oct. 10 — The new moon

The moon officially reaches its new phase at 11:50 a.m. EDT (1550 GMT), passing between the Earth and the sun and leaving the night sky completely devoid of lunar light pollution. This presents the absolute best weekend of the month for deep-sky observation.

Naked-eye stargazers should take this opportunity to find a dark rural location and trace the faint, glowing band of the Milky Way arching across the zenith. For observers with 8-inch or larger telescopes, the inky-black skies make this the perfect time to hunt down faint, low-surface-brightness targets like the Helix Nebula (NGC 7293) in Aquarius or distant galaxies in Pegasus that would otherwise be entirely washed out by moonlight.

Astrophotographers will find conditions ideal for long-exposure imaging, allowing them to gather hours of data on faint emission nebulas — like the elusive Cave Nebula (Sh2-155) in Cepheus or the Pacman Nebula (NGC 281) in Cassiopeia — using broadband filters without the sky background getting blown out.

When navigating the sky on a night this dark, use only a dim red-light flashlight to read your star charts, as even a brief glance at a white light will instantly ruin your eye's hard-earned chemical dark adaptation.

Sunday, Oct. 11 — Mars meets the Beehive

A beautiful pairing occurs tonight as Mars joins the Beehive Cluster (M 44) in the constellation Cancer.

Under dark skies, naked-eye observers can spot the reddish glow of the planet mingling with the hazy, thumbprint-sized patch of the open star cluster. This conjunction is an absolute showpiece for a pair of 10x50 binoculars or a telescope equipped with a wide-field, low-power eyepiece, which will frame the brilliant ruby disk of Mars against a glittering backdrop of dozens of blue-white cluster members.

Astrophotographers can capture this stunning color contrast using a tracking DSLR camera and a telephoto lens in the 200 mm to 300 mm range. When exposing the image, be careful not to overexpose the frame; a slightly shorter exposure time will preserve the rich, saturated rust color of Mars while still capturing the brighter stars of M 44. Observing this event when it is highest in the sky just before dawn will provide the sharpest views and the least amount of atmospheric distortion.

Monday, Oct. 12 — A Southern Hemisphere special (Mercury, Venus and moon alignment)

If you are reading an astronomical almanac this week, you might notice that the two-day-old waxing crescent moon makes close passes by both Venus and Mercury today. However, if you live in North America or Europe, don't waste your time scanning the western horizon after sunset — you probably won't see them.

During the autumn months in the Northern Hemisphere, the evening ecliptic (the path of the planets) sits at a very shallow angle, nearly parallel to the western horizon. This means that even though Venus and Mercury are technically east of the sun, they are too low in the sky and set almost immediately after sunset, hopelessly lost in the solar glare.

However, if you are reading this from the Southern Hemisphere — where it is currently spring — the geometry is reversed. The evening ecliptic stands steeply above the western horizon, meaning observers in places like Australia, South Africa, and South America will be treated to a beautiful, vertical stacking of a thin crescent moon, Mercury, and Venus shining in the evening twilight. It is a perfect reminder of how our position on Earth dramatically changes our view of the cosmos!

Tuesday, Oct. 13 — Vesta at opposition

Tonight, the second most massive object in the main asteroid belt, 4 Vesta, reaches opposition. When an asteroid is at opposition, it lies exactly opposite the sun in our sky, meaning it rises at sunset, remains visible all night, and reaches its highest point in the southern sky around midnight.

This geometry also marks Vesta's closest approach to Earth for the year, bringing it to a peak brightness of magnitude 6.5. While that is technically on the absolute edge of naked-eye visibility under perfectly dark skies, you will realistically need binoculars or a small telescope to spot it.

Vesta is currently drifting through the constellation Cetus (the Sea Monster). Because asteroids look exactly like faint stars through an eyepiece, the best way to confirm your sighting is to sketch or photograph the starfield, then check the exact same spot a night or two later to see which "star" has moved against the background.

Wednesday, Oct. 14 — The moon brushes Antares

As dusk falls tonight (ideally around 7:00 p.m. local time), look low toward the southwestern horizon to spot a beautiful pairing: the four-day-old waxing crescent moon sitting just a few degrees away from Antares, the ruby-red heart of the constellation Scorpius.

Observers in North America will see this as a stunningly close conjunction in the rich blue sky of nautical twilight. However, if you happen to be stargazing from Southern Polynesia or extreme southern locations around 9:00 p.m. GMT, the geometry aligns perfectly for a full lunar occultation, with the dark edge of the moon completely covering the red supergiant.

This close twilight encounter provides an ideal scenario for a creative photography project. Because the pair will be hovering less than 10 degrees over the horizon on the East Coast—and even lower for observers across the Atlantic—it is the perfect time to attempt "landscape astrophotography."

Use a tripod and try to frame the crescent moon and the distinct red point of Antares next to a compelling local foreground subject. For our U.K. skywatchers, catching this low-hanging twilight pairing dipping behind a historic site like Stonehenge is the ultimate bucket-list composition.

But even if you don't have ancient megaliths nearby, a prominent building spire, a local monument, or a gnarled tree branch will provide magnificent scale and artistic context against the twilight glow. Even a modern smartphone set to "Night Mode" can yield a stunning composition of the landscape meeting the cosmos before the pair sinks below the horizon.

Thursday, Oct. 15 — Hunting the Andromeda Galaxy

With the presence of the five-day-old waxing crescent moon in the evening sky, early observers are treated to a beautiful lunar view.

However, deep-sky observers will not have to wait long for ideal conditions. The moon sets by roughly 9:00 p.m. EDT (0100 GMT Oct 16), leaving the late-night sky pitch-black and perfectly primed for hunting our galactic next-door neighbor: the Andromeda Galaxy (M 31).

Located 2.5 million light-years away, M 31 is the most distant object visible to the naked eye under exceptional conditions, but it truly reveals its structure through binoculars. Look high in the northeastern sky, using the right side of the "W" asterism in Cassiopeia as a downward-pointing arrow to guide your eyes, or hop two stars up from Mirach in the constellation Andromeda. Through binoculars or a small telescope, the galaxy appears as an elongated, glowing smudge with a bright, concentrated core.

Friday, Oct. 16 — The Double Cluster punches through (evening)

As the waxing moon continues to brighten the evening sky, delicate galaxies and faint nebulas begin to wash out. However, open star clusters are perfectly suited to punch through the encroaching moonlight.

Tonight is an ideal time to target the Double Cluster in Perseus (cataloged as NGC 869 and NGC 884). Located roughly halfway between the distinct "W" asterism of Cassiopeia and the tip of Perseus, this spectacular pair of clusters is faintly visible to the naked eye under dark skies but explodes into a dazzling spray of stellar diamonds through binoculars or a low-power telescope eyepiece.

Because these young, hot supergiant stars are packed densely together, their combined, concentrated brilliance easily overcomes the lunar skyglow, offering a highly rewarding view regardless of the moonlight.

Saturday, Oct. 17 — Algol's minimum brightness

Tonight offers a perfect prime-time opportunity for North American observers to watch Algol, the famous "Demon Star" in the constellation Perseus, perform its orbital magic. Normally shining at a steady magnitude 2.1, this eclipsing binary star drops to a noticeably dimmer magnitude 3.4 when its fainter companion star passes directly in front of it.

The stellar system runs like clockwork on a 2.87-day period. Tonight, Algol reaches its absolute minimum brightness right around 10 p.m. EDT (0200 GMT on Oct. 18), when Perseus is positioned well up in the northeastern sky. To see the dip in brightness with your naked eye, compare Algol to nearby Almach in Andromeda or Mirfak, the brightest star in Perseus, early in the evening, and then check it again at the 10 p.m. minimum to see how much it has faded.

Sunday, Oct. 18 — First quarter moon

The moon officially reaches its First Quarter phase at 12:13 p.m. EDT (1613 GMT), presenting a perfectly half-illuminated disk when it rises in the evening sky later.

This is arguably the most breathtaking time to observe the lunar surface, as the sunlight strikes the moon at a harsh angle along the central terminator, casting vast, inky shadows across the landscape.

Through a telescope, the sweeping curve of the Apennine Mountains — the landing site of Apollo 15 — is spectacular, with jagged peaks jutting out into the darkness and deeply shadowed craters like Archimedes sitting prominently nearby.

Astrophotographers can create an incredibly detailed, high-resolution mosaic by using a planetary camera to record dozens of short, overlapping video panels of the terminator line, stacking and stitching them together in processing software.

Because the moon is so bright at this phase, it can temporarily ruin your dark adaptation; save your lunar observation for the very end of your stargazing session so you don't compromise your ability to hunt down faint deep-sky objects beforehand.

Monday, Oct. 19 — The Triangulum Galaxy (M33)

Tonight, aim your optics toward the small northern constellation of Triangulum to hunt down Messier 33, officially known as the Triangulum Galaxy.

Located roughly 2.7 million light-years away, M33 is the third-largest member of our Local Group of galaxies. Because it is oriented completely face-on from our perspective, its surface brightness is famously low. With a bright waxing gibbous moon dominating the evening sky tonight, the galaxy's delicate spiral arms will be completely washed out by lunar glare.

To get the best view, wait until the moon sets after 1:00 a.m. local time, leaving the predawn sky pitch-black to spot this glowing galactic smudge through binoculars or a telescope.

Tuesday, Oct. 20 — The colorful double star Almach

With a waxing gibbous moon illuminating the night sky, faint deep-sky targets like galaxies and nebulas are off-limits. Fortunately, double stars are completely immune to lunar skyglow, making tonight a perfect opportunity to target Almach (Gamma Andromedae).

Marking the foot of the constellation Andromeda, Almach appears as a single, bright magnitude 2.1 star to the naked eye. However, aim a small telescope at it using modest magnification (around 50x or higher), and it instantly splits into one of the most stunning color-contrast binary pairs in the autumn sky.

The brighter primary star glows a warm, golden topaz, while its close companion shines a delicate sapphire-blue or emerald-turquoise. It is an easy, highly rewarding target that yields vivid colors regardless of the bright moon nearby.

For astrophotographers, capturing this color contrast presents a unique challenge. Because the primary star is so bright, you do not need the long exposures required for galaxies. Using a simple smartphone adapter over your eyepiece, or a DSLR camera attached to your telescope, set your ISO low (around 200 or 400) and use a very fast shutter speed (just a fraction of a second).

Overexposure is the most common mistake when photographing double stars because it instantly blows out the image and turns those beautiful topaz and sapphire hues into featureless white blobs. To force your camera sensor to pick up the vivid colors, try throwing your telescope very slightly out of focus. Spreading the starlight across a few extra pixels on the sensor prevents the bright cores from washing out, dramatically enhancing the color saturation in your final image!

Wednesday, Oct. 21 — Orionid meteor shower peaks

Every October, Earth plows through the dust trail left behind by one of the most famous objects in history: Halley's Comet. The resulting Orionid meteor shower is known for exceptionally fast meteors — striking the atmosphere at 41 miles per second — that frequently leave persistent glowing trains. Under ideal conditions, observers can expect 15 to 25 meteors per hour radiating from near the upraised club of Orion the Hunter.

While the exact mathematical peak of the shower is calculated between 1400 and 1800 GMT (which falls squarely during daylight hours for North America), stargazers will not miss out on the action.

The absolute best observation window for this shower is in the predawn hours — anytime after midnight until just before the sun rises. This year, a roughly 75-76% illuminated waxing gibbous moon will wash out the early evening sky, but it sets around 2:00 a.m. local time. This leaves a perfectly timed, pitch-black window from moonset until dawn.

Do not stare directly at the radiant point in Orion. Meteors appearing right at the radiant will look like short, stubby streaks because they are traveling almost straight at you. Looking about 45 degrees away from Orion will allow you to see the longest, most spectacular meteor trails.

If you are attempting to photograph the shower, mount your camera on a tripod, use a wide-angle lens, and set it to take continuous long exposures (15 to 30 seconds) of the darkest part of the sky while you sit back in a reclining chair and enjoy the show.

Thursday, Oct. 22 — Fomalhaut, the Lonely Star of Autumn

As autumn deepens, the bright, solitary star Fomalhaut dominates the barren southern sky. Often referred to as the "Autumn Star" or the "Lonely Star," it shines at a prominent magnitude 1.23, making it incredibly easy to locate with the naked eye simply by extending a line southward from the right side of the Great Square of Pegasus. The best window to observe Fomalhaut is between 8:00 p.m. and 10:00 p.m. local time, when it reaches its highest point due south.

Despite an ~88% waxing gibbous moon dominating the sky tonight, Fomalhaut's brightness allows it to cut cleanly through the lunar glare. In fact, the moonlight actually helps this "Lonely Star" live up to its nickname: by washing out the surrounding faint background stars of Piscis Austrinus and Aquarius, Fomalhaut stands out even more dramatically as a single beacon in the south.

Because Fomalhaut never climbs higher than about 15° to 20° above the southern horizon for mid-northern latitudes, its light must cut through a dense column of Earth's atmosphere. This intense atmospheric turbulence causes the star to shimmer and flash violently in shades of blue, white, and emerald.

If you want to photograph Fomalhaut, take advantage of this low-altitude atmospheric scintillation. Mount your camera on a tripod, zoom in with a telephoto lens, throw the focus slightly soft, and take a short exposure (1 to 2 seconds). The turbulence will spread the starlight into a beautiful, multicolored jewel.

Friday, Oct. 23 — The moon and Saturn

Tonight offers a spectacular pairing for skywatchers of all levels as a brilliant 94% waxing gibbous moon passes about 8 degrees from Saturn in the constellation Cetus.

The moon shines at magnitude -12.0 on the border of Pisces and Cetus, appearing blindingly bright with its dark maria visible. Saturn shines at magnitude +0.4 in Cetus, appearing as a bright golden point of light with rings visible in telescopes. Titan shines nearby at magnitude +8.6 as a faint pinprick of light.

To the naked eye, Saturn will look like a bright golden-yellow star sitting to the lower left of the moon as the pair climbs in the southeast. Because they are roughly 8 degrees apart, the pair will not fit together in a standard 7x50 or 10x50 binocular field of view. However, a quick pan back and forth will allow you to capture them both easily. Through binoculars, you will not see Saturn's rings perfectly resolved, but the planet will clearly appear as an elongated oval or a star "with handles."

Saturn passed opposition on Oct. 4, meaning it is still exceptionally large and bright. The view is magnificent through a telescope at medium to high magnification (around 150x and above). The rings are clearly separated from the planetary globe, and you should be able to spot the dark Cassini Division. Because the planet is slightly past opposition, watch for the subtle, three-dimensional shadow that the globe of Saturn casts onto the back of its rings. You can also hunt for Saturn's largest moon, Titan, which looks like a tiny star nearby.

Imaging this close approach is a lesson in extreme dynamic range. The moon is exponentially brighter than Saturn, which poses a unique challenge. For smartphone users, if you just point and shoot, the moon will be a blown-out white blob. Tap on the moon on your screen and drag the exposure slider down until you can see the lunar maria and the dark seas. Saturn will still be captured as a distinct point of light nearby.

For advanced rigs, to capture surface detail on both bodies, you must shoot a High Dynamic Range composite. Take a very fast exposure, such as 1/250 second at low ISO, to properly expose the lunar craters. Then, without moving the camera, take a longer exposure, such as 1/15 second, to properly expose Saturn's rings and its moons. Blend the two exposures in post-processing to replicate the dynamic range of the human eye.

Saturday, Oct. 24 — The icy twin stars of Mesarthim

With the moon now at 98% illumination and dominating the evening, almost all deep-sky galaxies and nebulas are completely washed out. When the lunar glare is this intense, the best observing strategy is to hunt for bright point-source targets like double stars, which easily punch right through the moonlight. Tonight, turn your telescope toward the constellation Aries to find Gamma Arietis, traditionally known as Mesarthim.

Mesarthim is the third-brightest star in Aries, visible to the naked eye as a single point of light even under heavy skyglow. However, when you view it through a small backyard telescope at medium magnification, it splits into a stunning pair of perfectly matched, pure white stars. Because they are separated by a comfortable 7.4 arcseconds, you do not need massive optics to see the split clearly.

Mesarthim offers a fantastic slice of astronomical history. It was one of the very first double stars ever discovered with a telescope, spotted by English scientist Robert Hooke in 1664 while he was tracking a comet. The two stars have a brilliant, icy-white or pale bluish-white appearance. They look like a pair of celestial headlights shining through the dark.

Photographing Mesarthim is much easier than shooting contrasting binary stars because both components are close in magnitude. You do not have to worry about a brighter primary star completely blowing out a fainter companion in your exposure. Mount your smartphone or camera to your telescope eyepiece, set a low ISO, and use a fast shutter speed to capture the distinct split. Slightly defocusing the image will help plump up the star profiles and emphasize their icy white hue on your camera sensor.

Sunday, Oct. 25 — The Ring Nebula and the full moon filter trick

The moon reaches its peak full illumination shortly after midnight Eastern Time tonight, making it the full Hunter's Moon. With the lunar disk essentially at 100% illumination, the sky will be flooded with intense moonlight, which usually means deep-sky observing is completely off the table. However, planetary nebulas, like the famous Ring Nebula (M 57), in the constellation Lyra offer a fantastic exception to this rule because they respond incredibly well to specific equipment tricks.

The Ring Nebula is located high overhead in the evening sky, situated exactly halfway between the stars Sheliak and Sulafat at the bottom of Lyra's parallelogram. While the bright full moon will wash out the fainter background stars, Messier 57 has a very high surface brightness. If you use a telescope with moderate to high magnification (around 100x or more), you can still easily spot it as a small, ghostly gray smoke ring suspended in the moonlit sky.

If you want to completely defeat the lunar glare, tonight is the perfect time to use an Oxygen-III, or O-III, narrowband filter. Planetary nebulas like the Ring Nebula emit a massive portion of their visible light in the specific wavelengths of doubly ionized oxygen. By threading an O-III or Ultra High Contrast filter onto your telescope eyepiece, you effectively block out the broad-spectrum moonlight and atmospheric skyglow, while allowing the nebula's specific light to pass through untouched. The result is a dramatically darkened sky background, with the Ring Nebula punching through with striking contrast, proving that you do not have to pack up your telescope just because the moon is full.

Monday, Oct. 26 — The full Hunter's Moon

The full moon reaches its peak illumination at 12:12 p.m. EDT (0412 GMT), brilliantly washing out the faint stars and deep-sky objects across the night sky.

Traditionally known as the Hunter's Moon, it rises in the east just as the sun sets in the west, providing continuous, shadowless illumination from dusk until dawn. While the intense, direct sunlight makes the lunar surface look incredibly flat through a telescope — eliminating the topographic shadows of craters and mountains — it is the absolute best time to observe the moon's vast ray systems, such as the bright, sprawling ejecta patterns radiating outward from the young craters Tycho and Copernicus.

Astrophotographers can leverage the extreme brightness of the full moon to shoot stunning wide-angle landscapes, using a fast shutter speed to capture the glowing lunar disk nestled among silhouetted trees or city skylines.

Because the glare is literally blinding through an eyepiece, threading a dark neutral density filter or a polarizing filter into your optical train is best to observe the disk comfortably without destroying your night vision for the rest of the evening.

Tuesday, Oct. 27 — The moon meets the Seven Sisters

Tonight offers a beautiful celestial event as a waning gibbous moon passes directly in front of the Pleiades open star cluster, also known as the Seven Sisters or M 45. For observers across a large area of the northern U.S. and Canada, the best time to view this occultation is during the mid-to-late evening hours. Look 15 to 20 degrees up in the east-northeast to watch the brilliant moon hide the stars of the tiny, dipper-shaped cluster in the constellation Taurus. For observers in the Montreal area, the cluster's brightest star, Alcyone, will disappear behind the moon from about 8:27 p.m. to 8:57 p.m. EDT.

Because the moon is still very bright at roughly 95% illumination, its intense glare will wash out the fainter members of the Pleiades. While the cluster is usually a fantastic naked-eye target, tonight you will want to use binoculars to frame them both. A standard pair of 10x50 binoculars will easily fit the bright lunar disk and the sparkling blue-white stars of the Seven Sisters in the exact same field of view, creating a fantastic high-contrast celestial scene.

Wednesday, Oct. 28 — The Dumbbell Nebula moonlight challenge

Tonight, the 93% illuminated moon rises just as astronomical twilight ends, eliminating the usual dark-sky window for early evening observing. However, this heavy lunar glare provides the perfect opportunity to test your equipment on M 27, the famous Dumbbell Nebula. Located in the faint constellation Vulpecula (the Fox), this was the very first planetary nebula ever discovered, spotted by Charles Messier in 1764.

While intense moonlight washes out most faint deep-sky targets, the Dumbbell Nebula has high enough surface brightness to remain visible. For beginners using a small telescope or large astronomy binoculars, M 27 is relatively easy to find by pointing your optics almost exactly halfway between the bright star Altair in Aquila and the double star Albireo in Cygnus. It appears as a large, hazy, glowing apple core or an hourglass shape against the brightened sky.

For more advanced observers, the moonlit sky makes M 27 an outstanding target for the same narrowband filter trick we used on the Ring Nebula a few days ago. Threading an Oxygen-III or Ultra High Contrast filter onto your eyepiece will dramatically darken the bright background sky while allowing the nebula's ionized oxygen emissions to punch through, revealing the fainter outer extensions of gas that give the nebula its distinct, balloon-like shape.

Thursday, Oct. 29 — The early evening deep-sky window

Although the moon technically reached its absolute perigee point yesterday — coming within 226,432 miles (364,407 km) of Earth at 1:59 p.m. EDT — the visual and practical rewards culminate for backyard observers tonight. Because the moon is in a waning gibbous phase, it will not crest the eastern horizon for East Coast observers until approximately 8:35 p.m. local time. This late moonrise creates a fantastic window of pitch-black skies right after evening twilight, offering a perfect opportunity to hunt down deep-sky objects before the lunar glare returns.

Before the moon rises, take advantage of the dark sky to target two spectacular deep-space objects:

• The Owl Cluster (NGC 457): Located high in the northeast within the constellation Cassiopeia, this bright open star cluster is a massive crowd-pleaser for beginners. Its stars arrange themselves into the distinct shape of an owl or a stick figure with its arms spread, anchored by two brilliant stars that look just like glowing eyes.
• The Pegasus Globular Cluster (M 15): Located high in the south-southeast just off the nose of the winged horse Pegasus, this is one of the most densely packed globular clusters in our galaxy. Through a telescope at medium magnification, it looks like a pile of crushed diamonds scattered on black velvet.

When the moon finally rises later in the evening, it will appear exceptionally large due to the famous "moon illusion" combined with its recent perigee passage.

If you want to observe the moon exactly as it rises, leave your lunar filters in your eyepiece case. Earth's thick atmosphere naturally filters and dims the moonlight on the horizon, turning the lunar disk a beautiful, deep amber. You will only need to thread a polarizing or neutral-density filter onto your eyepiece once the moon climbs higher in the sky and returns to a blinding white.

Friday, Oct. 30 — The great Orion Nebula

As the calendar nears the end of October, the iconic winter constellations begin making their presence known before midnight. Tonight offers a great opportunity to target M 42, the famous Orion Nebula. By 11:30 p.m. local time, the constellation Orion the Hunter is rising well above the eastern horizon.

While a waning gibbous moon will also be sharing the late-night sky, the Orion Nebula has a famously high surface brightness. Through a backyard telescope or a good pair of binoculars, the central core of the nebula, illuminated by the young, hot stars of the Trapezium cluster, will clearly punch through the lunar glare. It will appear as a glowing, greenish-gray cloud of stellar nursery gas, making it a highly rewarding deep-sky target despite the moonlight.

Saturday, Oct. 31 — Ceres and the Halloween moon (predawn)

At 1500 GMT today, the moon passes just 0.5 degrees south of the dwarf planet Ceres, creating a lunar occultation for observers in specific regions of the globe. For observers on the East Coast of North America, 15:00 UTC translates to 11:00 a.m. EDT, putting this event squarely in the daytime sky. To get the best view of this incredibly close pairing, you will need to observe it in the predawn hours of Saturday morning.

Between 4:00 a.m. and dawn, the 67% illuminated waning gibbous moon will be positioned high in the southeast, steadily closing the gap with Ceres. Because Ceres shines at a faint magnitude 8.2, the intense lunar glare will make it completely invisible to the naked eye. You will need a telescope at medium to high magnification to pick out its faint, starlike point sitting just off the unlit edge of the lunar limb.

Even if you cannot see the exact moment of occultation during daylight later that morning, the Halloween moon acts as a perfect cosmic signpost to help you track down the largest object in the asteroid belt.

Skywatching terms

Gibbous: Used to describe a planet or moon that is more than 50% illuminated.

Asterism: A noteworthy or striking pattern of stars within a larger constellation.

Degrees (measuring the sky): The sky is 360 degrees all the way around, which means roughly 180 degrees from horizon to horizon. It's easy to measure distances between objects: Your fist on an outstretched arm covers about 10 degrees of sky, while a finger covers about one degree.

Visual Magnitude: This is the astronomer's scale for measuring the brightness of objects in the sky. The dimmest object visible in the night sky under perfectly dark conditions is about magnitude 6.5. Brighter stars are magnitude 2 or 1. The brightest objects get negative numbers. Venus can be as bright as magnitude -4.9. The full moon is -12.7 and the sun is -26.8.

Terminator: The boundary on the moon between sunlight and shadow.

Zenith: The point in the sky directly overhead.

Night sky observing tips

Adjust to the dark: If you wish to observe fainter objects, such as meteors, dim stars, nebulas, and galaxies, give your eyes at least 15 minutes to adjust to the darkness. Avoid looking at your phone's bright screen by keeping it tucked away. If you must use it, set the brightness to minimum — or cover it with clingy red film.

Light Pollution: Even from a big city, one can see the moon, a handful of bright stars, and the brightest planets — if they are above the horizon. But to fully enjoy the heavens — especially a meteor shower, the fainter constellations, or to see the amazing swath across the sky that is the disk of our home galaxy, the Milky Way — rural areas are best for night sky viewing. If you're stuck in a city or suburban area, use a tree or dark building to block ambient light (or moonlight) and help reveal fainter sky objects. If you're in the suburbs, simply turning off outdoor lights can help.

Prepare for skywatching: If you plan to be outside for more than a few minutes, and it's not a warm summer evening, dress more warmly than you think is necessary. An hour of winter observing can chill you to the bone. For meteor showers, a blanket or a lounge chair will prove to be much more comfortable than standing or sitting in a chair and craning your neck to see overhead.

Daytime skywatching: On the days surrounding the first quarter, the moon is visible in the afternoon daytime sky. At last quarter, the moon rises before sunrise and lingers in the morning sky. When Venus is at a significant angle away from the sun, it can often be spotted during the day as a brilliant point of light — but you'll need to consult an astronomy app to know when and where to look for it. When large sunspots develop on the sun, they can be seen without a telescope — as long as you use proper solar filters, such as eclipse glasses. Permanent eye damage can occur if you look at the sun for any length of time without protective eyewear.