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See Mercury with Jupiter and Saturn this Saturday (March 6) in the early morning sky.

Mercury meets up with Jupiter (Saturn and the moon, too!) in the morning sky this week

By Joe Rao

If you look low in the east-southeast sky at around 5:45 a.m. local time, you'll see them: the biggest planet in our solar system passing unusually close to the smallest planet in the solar system.

Asteroid Apophis seen on Jan. 9, 2013, from Slooh's remotely operated observatories in Chile and the Canary Islands.

Watch live tonight: Join Slooh's live webcast of asteroid Apophis flyby

By Space.com Staff

The Slooh online observatory will broadcast live views of the near-Earth asteroid Apophis tonight (March 5) at 8 p.m. EST (0100 GMT on Saturday).

An image of the asteroid Apophis captured by the Virtual Telescope Project, which is based in Rome, on March 2, 2021.

Huge asteroid Apophis will safely fly past Earth tonight. Here's where to watch live online.

By Elizabeth Howell

At least two astronomy broadcast services plan to showcase the asteroid Apophis as it flies by Earth safely on Friday (March 5).

An animation shows Apophis' 2029 path compared to the swarm of satellites orbiting Earth. The asteroid won't pass nearly as closely in 2021; it will remain 44 times more distant than the moon.

Large asteroid Apophis will safely fly by Earth on Friday

By Elizabeth Howell

Our solar system's most infamous asteroid will pass by Earth on Friday (March 5), and with a high-end telescope you can watch it as it safely whizzes by our planet.

There's a lot going in space this year. Check out our up-to-date space launch schedule and calendar here!

Space calendar 2021: Rocket launches, sky events, missions & more!

By Hanneke Weitering

Here's a guide to all the rocket launches and astronomical events in 2021, as well as milestones for space missions, anniversaries and conferences.

sky hub

Spotting UFOs: Do-it-yourself sky surveillance comes online

By Leonard David

If you are perplexed by reports of unidentified aerial phenomena and possible visitations of alien spacecraft, you can take action with do-it-yourself sky-monitoring gear.

The newfound comet C/2021 A1 (Leonard) will make its closest approach to Earth on Dec. 12, 2021.

Newfound Comet Leonard will blaze into view this year

By Joe Rao

A new comet is on its way in toward the sun, with prospects that it may become bright enough to see with the unaided eye by year's end.

The fireball that streaked over southern England on Feb. 28, 2021, as seen by Ben L., who provided it to the American Meteor Society.

Brilliant yellow-green fireball lights up sky above England (video, photos)

By Mike Wall

A fireball blazed across the skies of southern England Sunday night (Feb. 28), and it likely dropped singed hunks of cosmic rock on the countryside below.

march 2021 night sky zodiacal light

Best night sky events of March 2021 (stargazing maps)

By Chris Vaughan

See what's up in the night sky for March 2021, including stargazing events and the moon's phases, in this Space.com gallery courtesy of Starry Night Software.

The night sky is more than just the moon and stars, if you know when and where to look.

Night sky, March 2021: What you can see this month [maps]

By Chris Vaughan

Find out what's up in your night sky during March 2021 and how to see it in this Space.com stargazing guide.

march 2021 night sky mercury

The brightest planets in March's night sky: How to see them (and when)

By Joe Rao

Here's how to see planets visible in March's night sky.

An animation shows Apophis' 2029 path compared to the swarm of satellites orbiting Earth.

Planetary defense experts use infamous asteroid Apophis to practice spotting dangerous space rocks

By Meghan Bartels

Eight years after an asteroid exploded over Chelyabinsk, Russia, scientists are taking advantage of a flyby of the infamous asteroid Apophis to practice protecting Earth from space rocks.

A photo of a nearly full moon. The image was taken one day prior to the supermoon, or a moon that appears larger due to being the closest to Earth in its orbit.

2021 Full Moon Calendar

By Kimberly Hickok

The full moon happens about once a month. Find out when.

The full moon of February, called the Snow Moon, occurs Saturday, Feb. 27, 3:17 a.m. EST (0817 GMT).

February full moon 2021: See the 'Snow Moon' with Mars this weekend

By Jesse Emspak

The full moon of February, called the Snow Moon, occurs Saturday, Feb. 27, 3:17 a.m. EST (0817 GMT).

The Empire State Building in New York City was illuminated with red lights to celebrate the landing of NASA's Mars rover Perseverance.

NYC's Empire State Building turns red to celebrate NASA's Perseverance rover

By Elizabeth Howell

New York City's most famous building turned red overnight to celebrate NASA's Perseverance rover landing Thursday (Feb. 18).

The moon and Mars will appear in a conjunction on the night of Feb. 18, 2021.

Celebrate NASA's Perseverance Mars rover landing by spotting the Red Planet near the moon tonight

By Doris Elin Urrutia

Mars may not be ready to escape the spotlight just yet, even after receiving its third Earthly mission this month.

This illustration (made using real images and data) shows the moon in shadow during the "new moon" lunar phase.

February new moon 2021: Bright winter stars abound as planets fade near the sun

By Jesse Emspak

Mars is the lone bright planet in the new-moon sky this Thursday (Feb. 11).

This sky map shows Venus near Saturn at sunrise on Feb. 6, 2021. The planets will be difficult if not impossible to observe due to their close proximity to the sun.

February marks a month of 'combustible' planets and tricky skywatching

By Joe Rao

One astronomical term which is rarely used anymore is "combust," which refers to a celestial body that appears to be in such close proximity to the sun that it is impossible to observe.

Supermoon

Full moon names (and more) for 2021

By Joe Rao

Here is a list of common full moon names, dates and times in 2021, beginning with the "Wolf Moon" in January, to the "Cold Moon" in December.

NASA's Parker Solar Probe spotted six different planets on June 7, 2020, with the sun out of frame to the left.

A string of planets in our solar system sparkles in photos from 3 different sun probes

By Elizabeth Howell

Turns out sungazing is not the only thing NASA's solar spacecraft do.