25 September 2013, 01:01 PM ET
Io is the most volcanically active object in the solar system, dissipating its massive stores of internal heat via intense eruptions. Earth may have gone through a similar phase in its youth, before the planet cooled enough for plate tectonics to start up
11 September 2013, 02:01 PM ET
Here are five facts about NASA's twin Voyager 1 and 2 spacecraft.
11 September 2013, 11:27 AM ET
TextureCam, a technology whose development is led by NASA's Jet Propulsion Laboratory, is designed to take pictures of rocks in 3-D and prioritize the ones that are most scientifically interesting. The smart camera could be used on Mars or more distant lo
10 September 2013, 10:40 AM ET
The University College of London, the only UK host of a NASA Regional Planetary Image Facility, has recently released a stunning selection of the historic space pictures—many of them never published online before, others only ever in low resolution.
09 September 2013, 05:23 PM ET
Two scientists speak of the dwarf planet Ceres, which will be visited by NASA's Dawn mission in early 2015.
04 September 2013, 05:38 PM ET
A colossal storm that raged on Saturn in 2010 and 2011 churned water ice up from deep within the ringed planet's thick atmosphere. NASA's Cassini spacecraft detected the ice crystals from orbit, marking the first observation of water on the planet.
30 August 2013, 02:28 PM ET
Saturn, Venus, Mars and Jupiter will all be sharing the September nights' sky with the Moon, and toward the end of the month, comet ISON will line up with Mars.
30 August 2013, 01:03 PM ET
As we kick off the Labor Day holiday weekend, early on Saturday (Aug. 31) during the predawn hours, check out the east-northeast sky anytime after 2 a.m. local daylight time and your eyes will immediately be drawn to the two brightest objects in the sky a
27 August 2013, 12:01 PM ET
Scientists are hoping to induce an unconscious state in astronauts so that they can be stored in cold capsules for long space flights. Here's how astronaut hibernation and suspended animation might one day work.
14 August 2013, 12:22 AM ET
Is there life on Europa, Jupiter's moon? Perhaps — but researchers may not know for years, or even decades, depending on the outcome of wars over NASA's budget that broke out before Congress went home for its August recess. Here is why.
13 August 2013, 04:10 PM ET
The odometer on NASA's Juno probe clicked over to 880 million miles (1.415 billion kilometers) on Monday (Aug. 12), space agency officials said. The spacecraft is thus halfway to Jupiter, at least in terms of distance traveled.
08 August 2013, 08:00 AM ET
The top priority of a lander mission to Jupiter's potentially life-supporting moon Europa should be investigating the composition and chemistry of its subsurface ocean, scientists say. It should also study the dynamics of the moon's ice shell.
01 August 2013, 02:34 PM ET
Scientists are eager to learn if Europa's huge subsurface ocean harbors alien life. See how Europea's frozen surface covers a suspected vast ocean of water that could be a home for microbial life. This SPACE.com infographic shows how.
31 July 2013, 11:48 AM ET
Saturn, Venus, Mars, Mercury and Jupiter will all be visible in the August night skies, as will the annual Perseid meteors. A number of nebulas will also be easy to find among the constellations.
29 July 2013, 11:35 PM ET
After nearly a half-century of neglect – and nine months of extensive restoration – the life-sized Star Trek prop is ready for active duty. Superfan Adam Schneider and his family show SPACE.com what it took to get Galileo flying again.
29 July 2013, 07:00 AM ET
Jupiter's icy moon Europa is shrouded in mystery. Scientists have long been intrigued by Jupiter's fourth largest moon with its unmapped ocean and icy shell.
17 July 2013, 02:10 PM ET
July is full of encounters between astronomical objects, and the action continues this weekend with three different planets taking center stage. Venus will dance with the star Regulus Sunday evening, while Mars and Jupiter will be visible in Gemini (The T
13 July 2013, 10:19 AM ET
In mid-July 2013, skywatchers will be able to observe the moon moving in relation to Spica and Saturn. Also, Mars and Jupiter appear to move together in the morning sky.
10 July 2013, 08:12 PM ET
A House panel approved appropriations legislation Wednesday (July 10) that would give NASA $16.6 billion for 2014, cutting agency spending back to levels not seen since 2007. The proposed 2014 appropriation is about $300 million less than what NASA ended
08 July 2013, 07:00 AM ET
Researchers plan to launch a tiny spacecraft to Earth orbit and beyond in the next 18 months or so, in a key test of new propulsion technology that could help cut the cost of planetary exploration by a factor of 1,000.
28 June 2013, 02:07 PM ET
Mars and Jupiter will shine bright in the predawn morning skies of July 2013. Learn how to see the planets and the annual Delta Aquarid meteor shower in late July.
26 June 2013, 02:21 PM ET
‘Star Trek’ superfans Adam and Leslie Schneider unveil the fully restored Galileo shuttlecraft, a life-size prop from the iconic 1960s TV science fiction series while fans cheer on June 22, 2013. The Galileo will be donated to Space Center Houston.
20 June 2013, 01:50 PM ET
Mercury and the solstice make this a can't-miss week in skywatching.
19 June 2013, 10:16 AM ET
Russia's Ganymede lander could launch with Europe's JUICE probe.
14 June 2013, 11:13 AM ET
Could a small sub help find life under Europa's icy shell?
14 June 2013, 06:49 AM ET
The four Galilean moons of Jupiter are Io, Europa, Callista and Ganymede.
13 June 2013, 03:05 PM ET
The potential world sits about 7.5 billion miles from its host star.
12 June 2013, 02:03 PM ET
Exoplanet experts answer questions about missions to discover and probe alien worlds.
07 June 2013, 06:48 AM ET
These exotic worlds stop their inward migration after their orbits circularize.
07 June 2013, 03:19 AM ET
A night sky photographer shot this stunning image of Orion over mustard fields in India.
06 June 2013, 07:11 AM ET
Certain spots on the icy moon are more likely to preserve pristine compounds from Europa's interior ocean.
04 June 2013, 10:57 AM ET
Look for Mercury, Venus and Jupiter in close proximity in early June, a rare meteor shower in mid June, and near earth asteroids throughout the month.
03 June 2013, 05:04 PM ET
A star smaller than Jupiter regularly fires off flares as powerful as the biggest eruptions from our sun.
29 May 2013, 10:33 AM ET
Massive 'hot Jupiters', gas giants that orbit close to their stars, are usually tidally locked, which means they have a permanent day side and permanent night side. The extreme differences in temperatures on the two sides drive powerful storms.
26 May 2013, 10:10 AM ET
Jupiter, Mercury and Venus will shine in a cosmic triangle just after sunset tonight (May 26).
24 May 2013, 03:48 PM ET
Three planets are teaming up for a Memorial Day planet parade.