07 May 2013, 08:00 AM ET
But the more scientists learn, the more questions they have about these strange new worlds.
06 May 2013, 02:00 PM ET
After decades of deterioration, Star Trek's Galileo shuttlecraft mockup is being restored to its original glory.
06 May 2013, 07:00 AM ET
Water in Jupiter's stratosphere almost entirely comes from the 1994 crash of Comet Shoemaker-Levy 9, scientists say.
29 April 2013, 06:45 AM ET
The half-frozen, half-oceanic worlds might be good places to look for alien life.
18 April 2013, 05:00 AM ET
Researchers collected the chemical fingerprints of four warm, cloud-covered alien worlds that lie 128 light years away from Earth.
17 April 2013, 12:36 AM ET
The dark hot spot in this false-color space wallpaper from NASA's Cassini spacecraft is a window deep into Jupiter's atmosphere. All around it are layers of higher clouds, with colors indicating which layer of the atmosphere the clouds are in.
09 April 2013, 03:31 PM ET
Astronomers have caught a black hole snacking on what may be a free-flying giant planet.
05 April 2013, 04:04 PM ET
On April 5th, 1973 the Pioneer 11 spacecraft was launched from Cape Canaveral on what was originally a back up mission for the Pioneer 10. Eventually NASA made an ambitious mid-mission change to Pioneer 11's trajectory, sending it to Saturn & beyond.
05 April 2013, 06:30 AM ET
The hundreds of volcanoes on Io are farther east than they're supposed to be.
04 April 2013, 05:09 PM ET
NASA's New Horizon mission snapped imagery of volcanic debris emanating from Io's Tvashtar volcano in 2007. The plume reaches up to 205 miles above the surface of Io.
04 April 2013, 10:25 AM ET
Saturn's tilt will make this April one of the best for stargazers to view the planet's magnificent rings since 2006. Star clusters, the comet Pan-STARRS , and Jupiter will also be visible in the nights sky.
01 April 2013, 03:49 PM ET
Jupiter & Saturn, galaxies from the Leo constellation, the Lyrid Meteor Shower and a partial lunar eclipse highlights the night sky in April.
27 March 2013, 07:20 AM ET
Photographer VegaStar Carpentier captured this dazzling view of the moon and Jupiter on March 17, 2013.
25 March 2013, 06:00 AM ET
Photographer Greg Gibbs captured this stunning photo of an airplane cruising in front of the moon and Jupiter.
25 March 2013, 05:59 AM ET
Spikes of ice along Europa's equator could explain the satellite's oddly warm midsection.
20 March 2013, 01:02 PM ET
NASA's Voyager 1 and 2 probes launched in 1977 to visit the outer planets of the solar system. After 35 years in space, the twin probes are approaching the edge of our solar system.
19 March 2013, 07:00 AM ET
A look at the robotic spacecraft currently sending data home from beyond Earth orbit.
16 March 2013, 07:16 AM ET
The celestial duo will dance together Sunday evening.
14 March 2013, 04:31 PM ET
Jupiter's equatorial zone presents dark patches known as 'Hot Spots'. These ammonia clouds holes at the top of the atmosphere reveal lower layers of the gas giant. They are part of the atmospheric structure called Rossby Waves (previously unknown).
13 March 2013, 11:02 AM ET
A close conjunction of the moon and Jupiter is sure to dazzle stargazers this week.
06 March 2013, 06:40 AM ET
Europa's ocean seems to have contact with the surface, making all sorts of chemical reactions possible.
25 February 2013, 01:36 PM ET
This March, the Gemini and Cancer constellations will dominate the nights sky, while the planets Jupiter and Saturn will be visibile through telescopes.
25 February 2013, 06:30 AM ET
Scientists approved 11 experiments for an ambitious mission to explore Jupiter's icy moons.
25 February 2013, 06:30 AM ET
Exploring these undersea systems may help scientists understand how life got started on Earth.
22 February 2013, 02:19 PM ET
Nicolas-Louis de Lacaille catalogued the positions of 9,766 southern stars in just 11 months in the 1750s.
12 February 2013, 12:21 PM ET
NASA's Voyager and Galileo missions spotted key evidence of Europa's ocean while studying the icy moon.
04 February 2013, 02:54 PM ET
The Voyager mission's project scientist talks about what it will mean to leave the solar system.
01 February 2013, 11:37 AM ET
Stargazers will be able to see a clear view of the Orion and Canis Major Constellations this month, and the many bright stars they contain.
25 January 2013, 07:00 AM ET
The strange organisms that thrive at vents today could teach researchers how life arose on our planet.
22 January 2013, 09:31 AM ET
Matt Hartman captured Earth's Moon and the Gas Giant in close skywatching proximity on January 21st, 2013.
14 January 2013, 07:07 PM ET
Learning more about Earth's seafloor could help researchers plan a Europa mission.
09 January 2013, 01:30 AM ET
Astronomers have mapped out the weather of a brown dwarf in unprecedented detail.
03 January 2013, 06:00 AM ET
A brief rundown of the intrepid spacecraft currently sending data home from beyond Earth orbit.
31 December 2012, 09:04 AM ET
The first month of 2013 features the Auriga constellation, double star Capella, up to 40 Quadrantids per hour during the showers peak, Jupiter and Saturn.
31 December 2012, 07:00 AM ET
Night sky photographer Tamas Ladanyi shoots stunning image of the moon and Jupiter over a lake in Hévíz.
28 December 2012, 09:38 AM ET
NASA points out a few things to keep an eye out for when looking skyward in January.