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.
18 February 2011, 03:20 PM ET
NASA's Messenger spacecraft has snapped a solar system family portrait.
17 January 2011, 06:35 PM ET
A list of skywatching events in January 2011 that you don't want to miss.
05 January 2011, 09:38 AM ET
Early risers this week will be treated to a spectacular display: Mercury, Venus, and Saturn will appear just before sunrise.
20 December 2010, 10:00 AM ET
How to best observe the major planets of our Solar System. Some have worlds of their own.
24 November 2010, 04:25 PM ET
The U.S. Postal Service has unveiled the designs for two new space-themed stamps to be released in 2011 to honor Alan Shepard and a mission to Mercury.
19 November 2010, 09:11 AM ET
First Flight for NASA's New Moon Rocket
15 November 2010, 04:07 PM ET
Mercury is the closest planet to the Sun in Earth’s solar system, but has no moons and no substantial atmosphere. Mercury is named after the Roman swift-footed messenger God.
22 September 2010, 04:08 PM ET
Two NASA satellites peering at the sun have snapped photos of Mercury's long, comet-like tail, and it took an interested amateur to bring the pictures to light.
16 September 2010, 07:37 AM ET
Stargazers can get a great look at Jupiter on any clear night for the rest of September. The giant planet, always bright, will be especially hard to miss as it makes its closest pass to Earth for the year.
15 September 2010, 04:00 PM ET
Whenever Messenger zooms close to the sun, the probe makes a search for hypothetical tiny asteroids called vulcanoids.
15 September 2010, 03:50 PM ET
A new photo shows the Earth and moon as seen from deep space by a NASA probe near the sun.
15 September 2010, 07:58 AM ET
Next week is the best 2010 morning apparition of Mercury for northern hemisphere observers.
18 August 2010, 06:00 PM ET
New U.S. postage stamps to be released next year will honor 1st American in space Alan Shepard and NASA's MESSENGER mission to Mercury.
30 July 2010, 03:54 PM ET
A NASA spacecraft that has been studying Mercury, the innermost planet in our solar system, is about eight months away from achieving its main objective of entering the planet's orbit. But, after a series of flybys, the steadfast probe has already unlocke
25 July 2010, 12:35 PM ET
Space rock aficionados are set to descend on New York for the 73rd Annual Meeting of the Meteoritical Society, beginning Monday and running through July 30.
15 July 2010, 02:05 PM ET
Mercury could be wracked by intense magnetic disturbances and have experienced volcanic activity for much longer than once thought, according to several new studies.
03 May 2010, 02:02 PM ET
Guenter Wendt, the original pad leader for NASA's manned space program and the last man the Apollo astronauts saw before launching to the moon, died at his home in Merritt Island, Fla., Monday.
14 April 2010, 08:29 AM ET
On Thursday April 15, the evening starts with a triple conjunction of the moon, Mercury, and Venus, then continues with Mars visiting the Beehive.
02 April 2010, 03:15 PM ET
An Italian astronomer caught the rare sight of Venus and Mercury together over Rome in the night sky in a new photo.
26 March 2010, 07:25 AM ET
For the next couple of weeks, brilliant Venus and the elusive planet, Mercury, perform a sort of celestial dance for two in the western twilight sky.
26 February 2010, 08:22 AM ET
Since last summer, the dominant evening planet was Jupiter, but now Venus has emerged.
21 December 2009, 10:50 AM ET
The first African-American to fly in space, along with three other accomplished astronauts, are set to join the U.S. Astronaut Hall of Fame in June.
09 November 2009, 03:45 PM ET
Legendary space industry engineer Thomas J. O'Malley, 94, died Friday evening, shortly after a phone call from Mercury astronaut and former U.S. Sen. John Glenn, whom O'Malley launched into space in 1962 by pushing a button.
03 November 2009, 02:58 PM ET
Mercury probe sees seasonal changes, iron on surface during third flyby.
01 October 2009, 12:23 PM ET
New images of Mercury from final MESSENGER probe flyby show close-up of bright spot.
30 September 2009, 09:50 AM ET
A NASA spacecraft that completed its third and final flyby of the planet Mercury yesterday, snapping new pictures of the innermost planet, had a small data hiccup that has delayed release of the images.
29 September 2009, 01:24 PM ET
Night Sky column for September 25.
28 September 2009, 03:03 PM ET
NASA's MESSENGER spacecraft is set to make a close approach to the planet Mercury, revealing new views along the way.
10 June 2009, 01:22 PM ET
Computer simulations suggest a 1 percent chance of future planetary collisions.
08 June 2009, 09:03 AM ET
Spacecraft discovers new clues to how Mercury hangs on to its atmosphere.
11 May 2009, 06:39 AM ET
Mercury has been beaten up! But exactly how much and by whom is only now coming into focus as the Messenger spacecraft slowly settles into orbit. "Bad Astronomy's" Phil Plait reveals bits of the strange, scarred, shrunken surface of this small world.