29 March 2015, 09:51 AM ET
Two spaceflyers blasted off on the first-ever yearlong mission to the International Space Station and NASA announced its plan to haul a boulder from a near-Earth asteroid to lunar orbit. Here's a look at Space.com's top stories of the week.
27 March 2015, 05:00 PM ET
With spring underway, the evening sky is in transition. What new stars and constellations will adorn the night sky for the next few months?
16 March 2015, 01:42 PM ET
The Zodiac (arc of the planets, Sun and Moon) hosts the cosmic crab of Cancer and Earth's most famous twin brothers throughout March 2015. Jupiter rules the southeastern sky. Saturn rises after midnight.
15 March 2015, 11:29 AM ET
NASA launched a new space-weather mission and scientists found evidence of a hydrothermal system on Saturn's ocean-bearing moon Enceladus. Here's a look at Space.com's top stories of the week.
12 March 2015, 08:36 PM ET
Lockheed Martin’s ‘Jupiter’ space cargo tug is designed to fly freight to the International Space Station and beyond as a 21st century space vehicle. See how it works here.
12 March 2015, 12:50 PM ET
Lockheed hopes the system — which features a space tug known as Jupiter and a supply module called Exoliner — wins a NASA contract for the next round of cargo missions to the space station. But the company's ambitions extend beyond Earth orbit.
11 March 2015, 02:11 PM ET
Look for dazzling, silver-white Jupiter more than halfway up in the East-Southeast as the blue sky darkens in the evening.
09 March 2015, 07:00 AM ET
The atmosphere of Saturn's huge moon Titan may have been generated within the satellite as a consequence of hydrothermal activity, Data from Europe's Huygens lander suggests.
08 March 2015, 12:48 PM ET
A powerful camera spotted a comet and scientists captured images of a supernova four different times. Here are Space.com's pics for the top space stories of the week.
04 March 2015, 06:33 PM ET
March should be a great month for spotting planets for skywatchers, weather permitting. Venus is becoming increasingly more prominent in the evening sky, remaining above the horizon for 2.5 to 3 hours after the sun dips below the horizon
03 March 2015, 12:45 PM ET
Jupiter's moon Europa suffers from extreme cold and deadly radiation, but its astronomical and geological sights are unique in the solar system.
03 March 2015, 12:00 PM ET
Scientists believe conditions may be right for life, under Europa's icy crust.
26 February 2015, 09:40 AM ET
The Gemini Twins and a dimmer Cancer constellation make their way into the night sky in March.
21 February 2015, 04:46 PM ET
Europe's last cargo spacecraft came down to Earth in a fiery blaze and scientists reported seeing mysterious plumes emanating from Mars. Here are Space.com's picks for the best space stories of the week.
20 February 2015, 07:00 AM ET
NASA officials have asked scientists to consider ways that a Europa mission could search for evidence of alien life in the plumes of water vapor that apparently blast into space from Europa's south polar region.
18 February 2015, 06:30 AM ET
Bantam spacecraft should survive for about 15 minutes in Jupiter's thick air before bursting into flame, according to researchers developing a concept mission called SMARA (SMAll Reconnaissance of Atmospheres).
09 February 2015, 10:20 PM ET
Europa is an icy moon of Jupiter and one of the four so-called Galilean moons.
06 February 2015, 08:44 PM ET
The icy moon Europa is perhaps the most tantalising destination in our solar system.
05 February 2015, 04:25 PM ET
Jupiter will dazzle all night long for the entire month, and if you’re awake in the early morning hours, look for the ringed wonder, Saturn. Skywatchers will also have good opportunuties to see Mercury, Venus and Mars this month.
05 February 2015, 03:00 PM ET
See photos of a rare triple-moon conjunction on Jupiter as the shadows of Europe, Io and Callisto pass across the planet's face on Jan. 24, 2015 as seen by NASA's Hubble Space Telescope and skywatchers.
05 February 2015, 02:11 PM ET
The rare triple-moon conjunction, which Hubble witnessed on Jan. 24, involved Io, Callisto and Europa — three of Jupiter's four Galilean moons (so named because they were discovered by astronomer Galileo Galilei in the early 17th century).
05 February 2015, 11:24 AM ET
The Hubble Space Telescope’s Wide Field Camera caught Io, Callisto and Europa and their shadows passing across the face of Jupiter on Jan. 23rd, 2015, which happens only once or twice per decade.
03 February 2015, 03:19 PM ET
If your sky is clear early this evening, about an hour after sundown, you might be able to see the February full moon — sometimes known as the 'Snow Moon' — shining with the giant planet Jupiter in the east-northeast sky. Jupiter should be located to the
02 February 2015, 07:42 PM ET
The White House's fiscal year 2016 budget request for NASA, which was released Monday (Feb. 2), allocates $18.5 billion to the space agency, including $30 million to formulate a mission to Jupiter's moon Europa.
28 January 2015, 04:25 PM ET
Space Station crew member Terry Virts (NASA) snapped imagery of the storm that slammed the Northeast United States during a night pass on Jan. 28th, 2015. The ISS was orbiting at an attitude of 260 miles during the fly-over.
26 January 2015, 12:16 PM ET
The NOAA GOES-13 satellite captured the massive winter storm bearing down on the east coast of the United States on Jan. 26th, 2015. GOES ‘sees’ infrared radiant energy and reflected visible light.
23 January 2015, 10:37 AM ET
22 January 2015, 03:41 PM ET
On Friday night (Jan. 23), observers all across North America will witness a rare event when three of Jupiter’s moons, and their shadows, pass across the face of the giant planet. The next such "triple transit" won't occur until 2032.
20 January 2015, 03:53 PM ET
When astrobiologists contemplate life on nearby planets or moons, they often suggest such life would be simple. Instead of there being some kind of multicellular organism on, say, Jupiter's moon Europa, scientists instead aim to find something more like a
15 January 2015, 07:41 PM ET
The NASA probe launched in January 2005 and will encounter Pluto in the summer of 2015.
13 January 2015, 07:30 AM ET
Researchers were able to pinpoint the Saturn system's center of mass, or barycenter, within about 2 miles — a 50-fold improvement over the best estimates provided by ground-based telescopes, NASA officials said.
11 January 2015, 09:00 AM ET
Getting a handle on what rocky worlds in our solar system would look like from afar will give us a basis for comparison as we seek out distant, habitable exoplanets.
07 January 2015, 03:12 PM ET
Skywatchers have a chance to spot the bright planet Jupiter and the moon sparkling brightly in the sky tonight, weather permitting, but only if you know when and where to look.
05 January 2015, 01:42 PM ET
Skywatchers will be treated to a fascinating ballet of the so-called Galilean moons throughout the month, as the satellites pass one another, sometimes blocking (occulting) or casting shadows (eclipsing) and casting shadow onto Jupiter’s cloud tops.
29 December 2014, 07:31 AM ET
Researchers have trained the Hubble Space Telescope on Europa repeatedly since Europa's geysers were first announced last year, in an attempt to confirm and characterize the plumes. But they've come up empty.
15 December 2014, 01:40 PM ET
Skywatchers with telescopes on Earth will be able to witness a remarkable cosmic event tonght: Two of Jupiter's moons will cast shadows on the face of the gas giant in the same night.