22 May 2013, 01:37 PM ET
On May 26th three planets, Venus, Jupiter, and Mercury, will appear in a triangular formation on the western horizon just after sunset.
21 May 2013, 09:50 AM ET
Such a tight three-planet grouping won't happen again until 2026.
20 May 2013, 12:13 PM ET
Night-sky-watchers alert: This tri-planetary conjunction will be most apparent from May 26th to June 5th. Here's where to see it best.
20 May 2013, 07:00 AM ET
The iconic city as seen through other planets' air.
20 May 2013, 07:00 AM ET
The project showcases the diversity of worlds in our solar system.
26 April 2013, 07:40 AM ET
NASA's Messenger and Stereo-A space probes were not affected by three back-to-back solar storms, scientists say.
24 April 2013, 05:59 PM ET
The three solar eruptions may deal a glancing blow to NASA's Messenger spacecraft at Mercury.
08 April 2013, 07:00 AM ET
NWA 7325 may be too old to have plausibly come from the solar system's innermost planet.
04 April 2013, 11:46 AM ET
See photos of America's historic spaceport, Kennedy Space Center in Florida
29 March 2013, 12:35 PM ET
The comet ISON is making what astronomers believe is its first trip through the inner solar system, taking a sweltering pass by the sun (making ISON a 'sungrazing' comet) and then back past Earth in December.
28 March 2013, 03:19 PM ET
A newfound meteorite may actually be from Mercury.
19 March 2013, 07:00 AM ET
A look at the robotic spacecraft currently sending data home from beyond Earth orbit.
18 March 2013, 08:21 AM ET
Comet Pan-STARRS has not disappointed astronomers and stargazers after surviving a close brush with the sun in March 2013, NASA says.
14 March 2013, 01:59 PM ET
NASA's Solar TErrestrial RElations Observatory (STEREO) snapped imagery of the comet as it flew between the two planets. A three day time-lapse (March 9-12, 2013) was compiled from the photos.
11 March 2013, 07:00 AM ET
The first spacecraft to orbit Mercury will have to shut down soon, unless it gets a mission extension.
06 March 2013, 06:35 AM ET
NASA's Messenger probe snapped photos of 100 percent of the planet's surface.
27 February 2013, 06:00 AM ET
Observations from NASA's Messenger probe indicate Mercury was once roiling with magma.
22 February 2013, 03:49 PM ET
See amazing photos of Mercury taken by MESSENGER spacecraft in April 2011 through 2012.
22 February 2013, 03:00 PM ET
The new Mercury video by NASA's Messenger spacecraft shows an oddly colorful planet.
19 February 2013, 06:24 PM ET
Thousands images from NASA MESSENGER's wide angle camera comprise this rotating false-color mosaic map. The visible colors are correlated with variations in Mercury's surface spectral reflectance.
11 February 2013, 11:09 AM ET
Find out when and where to look for the pink-looking planet.
11 February 2013, 08:20 AM ET
The closest planet to the Sun (looking pinkish because of the hues of the setting Sun) and the Red Planet will be visible for all to see in February 2013. Find out when and where to look.
08 February 2013, 06:30 AM ET
February offers the best opportunity to spot Mercury in the night sky.
25 January 2013, 05:34 PM ET
On January 23rd, 2013, eruptions on the Sun sent coronal mass ejections in front of Mercury and in the direction of Earth (strong impact not expected). NASA's SDO and STEREO spacecrafts captured the imagery.
03 January 2013, 06:00 AM ET
A brief rundown of the intrepid spacecraft currently sending data home from beyond Earth orbit.
30 November 2012, 07:00 AM ET
Life's raw materials may be common throughout the solar system.
29 November 2012, 05:50 PM ET
Mercury is the closest planet to the sun, yet still has shadowy secrets.
29 November 2012, 04:46 PM ET
Billions of tons of water ice hides in frozen pits at the north pole of the hot planet Mercury.
29 November 2012, 03:34 PM ET
It has been estimated that there may be up to 1 trillion metric tons of water ice on Mercury. Scientist David Lawerence explains how NASA's MESENGER mission's neutron spectroscopy data contributed to the find.
29 November 2012, 02:01 PM ET
Vast supplies of water ice and organic material on Mercury were found by NASA's Messenger probe.
29 November 2012, 10:19 AM ET
You may need to rise early to see Mercury, but Jupiter is unmistakable in the night sky.
20 November 2012, 02:56 PM ET
The contraction of the planet Mercury pulled the surface together, but new formations created by stretching have recently been found near squeezed features.
13 November 2012, 10:30 AM ET
The picture was snapped by NASA's Messenger spacecraft.
31 October 2012, 01:52 PM ET
The Mariner 10 spacecraft gave us the first close-up view of the sun's closest planet.
26 October 2012, 05:00 PM ET
The rocky, metallic worlds of the inner solar system look quite different from those of the outer solar system, one theory supposes they formed in much the same way. However, a competing theory suggests they may have formed from different components.
12 October 2012, 01:46 PM ET
Cookie! A new photo from NASA's Messenger spacecraft looks a lot like Sesame Street's Cookie Monster.