20 July 2011, 03:33 PM ET
Mercury is reaching its eastern most point in the night sky tonight.
28 June 2011, 11:09 PM ET
Look for Mercury in the northwestern sky just after sunset between June 30 and July 10.
16 June 2011, 05:30 PM ET
NASA's Messenger probe is already revealing intriguing new details about Mercury.
13 June 2011, 10:24 AM ET
Each week we investigate lingering questions about cosmic objects. Now batting: Mercury.
27 May 2011, 12:49 PM ET
Look to the skies this Memorial Day weekend to see four planets near the moon.
11 May 2011, 01:41 PM ET
Over the next two weeks, the four brightest planets, Mercury, Venus, Mars, and Jupiter, perform a complex dance at dawn
06 May 2011, 07:35 AM ET
See Venus, Jupiter, Mercury and Mars together in the predawn sky over the next week.
05 May 2011, 12:19 PM ET
NASA commemorated the launch and landing of the first American spaceflight to honor its 50th anniversary.
05 May 2011, 06:00 AM ET
On the anniversary of Alan Shepard's flight, America is at a turning point in space.
04 May 2011, 06:27 PM ET
NASA's history-making first human spaceflight and Messenger mission to Mercury will live on as U.S. postage stamps.
04 May 2011, 04:10 PM ET
In late May and early June, the Moon will appear to dance from day to day with Jupiter, Mercury and Venus. This animation looks East at 5:00am from the U.S. East Coast. Viewers with telescopes can also spot Uranus, Neptune and Ceres in this ballet.
03 May 2011, 03:50 PM ET
From spacesuits to tissue boxes that have been to the moon, a mixed bag of items for sale.
03 May 2011, 01:33 PM ET
Mercury astronaut's Alan Shepard and John Glenn, along with flight controller Chris Kraft and recovery operations chief Bob Thompson recount the historic first American manned flight into space; Freedom 7 launched Sheppard on May 5, 1961.
28 April 2011, 02:46 PM ET
Skywatching tips for how you can view six planets aligned above the rising sun.
18 April 2011, 09:41 AM ET
The planets Mercury and Mars will appear together on Tuesday, April 19.
01 April 2011, 05:33 PM ET
Here's a look at how to observe the planets of the solar system in 2011.
30 March 2011, 05:26 PM ET
A NASA spacecraft now circling Mercury is set to tackle some of the planet's mysteries – including whether or not water ice lurks in its craters.
29 March 2011, 05:01 PM ET
A stark, gray landscape and big crater dominate the 1st photo of Mercury from orbit.
29 March 2011, 12:00 PM ET
NASA's Messenger spacecraft is the first dedicated to orbiting Mercury, the solar system's innermost planet.
29 March 2011, 06:24 AM ET
NASA's Messenger mission is the first ever set to orbit the planet Mercury.
28 March 2011, 05:20 PM ET
NASA's Messenger probe will photograph previously unseen regions of Mercury's south pole.
18 March 2011, 03:46 PM ET
The audience erupted in applause as NASA's Messenger probe arrived in orbit around Mercury, becoming the first spacecraft ever to do so.
18 March 2011, 01:36 PM ET
The U.S. Postal Service is issuing a stamp for NASA's Mercury mission and astronaut Alan Shepard.
17 March 2011, 08:39 PM ET
NASA's Messenger spacecraft will study Mercury from orbit for the next 12 months.
17 March 2011, 10:00 AM ET
NASA's Messenger spacecraft will become the first probe ever to orbit the solar system's innermost planet.
16 March 2011, 04:57 PM ET
Here are 10 interesting features of the $446 million Messenger spacecraft and its mission to the planet Mercury.
16 March 2011, 08:00 AM ET
After more than six years of spaceflight, NASA's Messenger probe is almost ready to begin investigating some key questions about the planet Mercury.
15 March 2011, 05:41 PM ET
NASA's Messenger probe will become the first spacecraft ever to enter into orbit around the solar system's innermost planet.
15 March 2011, 03:36 PM ET
Watch the Mercury orbit insertion maneuver and the spacecraft’s first orbit around the planet.
14 March 2011, 03:59 PM ET
The elusive planet Mercury is bright and visible to skywatchers as NASA's Messenger probe nears the planet.
14 March 2011, 11:15 AM ET
NASA's Messenger spacecraft arrives in orbit around Mercury on Thursday, March 17.
11 March 2011, 12:01 PM ET
Next week NASA's Messenger spacecraft will become the first probe to orbit Mercury.
11 March 2011, 06:00 AM ET
NASA's Messenger probe promises to show us a whole new Mercury when it arrives in orbit around the planet next week.
06 March 2011, 03:43 PM ET
Jupiter's 12-year orbit around the sun is carrying it out of Earth's evening skies.
03 March 2011, 05:22 PM ET
The new moon of March arrives Friday. Here's how to see the first sliver the new moon.
24 February 2011, 07:56 PM ET
A new Mercury probe has survived a scorching test run in a giant oven, showing that the craft can withstand the hellish heat of the solar system's innermost planet. The BepiColombo mission is slated to launch in August 2013.