30 October 2014, 03:51 PM ET
This week is one of the rare opportunities when Mercury is relatively easy to spot. It will mean getting up before the sun, but once spotted, you will be able to follow Mercury until it is drowned out by daylight.
19 October 2014, 03:48 PM ET
Last week's lunar eclipse wasn't just a show for Earthlings, NASA's MESSENGER mission was also watching from Mercury, 66 million miles away.
15 October 2014, 05:54 PM ET
The images, taken by NASA's MESSENGER spacecraft, suggest that the ice lurking within Mercury's polar craters was delivered recently, and may even be topped up by processes that continue today, researchers said.
15 October 2014, 01:49 PM ET
NASA's Messenger spacecraft is the first dedicated to orbiting Mercury, the solar system's innermost planet.
02 October 2014, 12:40 PM ET
Look up to see planets parading across the sky this month. A series of planets, big and small, will reveal themselves to skywatchers on Earth, if weather permits.
27 September 2014, 07:00 AM ET
For a couple of hours after nightfall Sunday (Sept. 28), Mars will be a fairly conspicuous light. The Red Planet will have a companion this evening; sitting below and to its left will shine the reddish 1st-magnitude star Antares.
01 August 2014, 02:43 PM ET
NASA's MESSENGER mission flew over Mercury's north pole on June 8th, 2013 on its way around the planet at an altitude of 71-102 miles. The surface that can reach 800°F.
24 July 2014, 05:01 PM ET
Mercury and Venus will star in an early morning meet-up with the moon Friday (July 24). Both planets can be seen low in the east-northeast roughly 45 minutes before sunrise.
15 July 2014, 12:27 PM ET
A Mercury spacecraft lands in the ocean after launched from Little Joe in a High-Q-Abort test.
06 July 2014, 01:01 PM ET
A colossal but glancing smashup with a roughly Earth-size planet could have stripped away much of proto-Mercury's rocky mantle, explaining why the tiny, sun-scorched world has such a huge iron core today, researchers say.
01 July 2014, 03:25 PM ET
Pluto reaches opposition and can be seen with a medium-sized telescope and dark skies. Dwarf planet Ceres and asteroid Vesta will be quite close to one another on the night sky. But each is a tough target.
30 June 2014, 02:29 PM ET
During the Friendship 7 mission, John Glenn experiences weightlessness.
30 June 2014, 10:29 AM ET
Saturn and Mars are visible in the evening and Venus and Mercury can be found before sunrise. At the end of the month, the annual Delta Aquarid peaks with 20 meteors per hour. -- Skywatching Guide: http://goo.gl/uETMG9
11 June 2014, 12:53 PM ET
NASA's Mars rover Curiosity has photographed Mercury crossing the face of the sun, marking the first time such a planetary "transit" has ever been imaged from the surface of a planet other than Earth.
10 June 2014, 06:32 PM ET
The Mars Science Laboratory's Mast Camera captured the planet on June 3rd, 2014. This is the first time a planet has been captured transiting the Sun from a planet other than Earth. Two sunspots were also seen. FULL STORY: http://goo.gl/s0ZLUu
09 June 2014, 11:54 AM ET
The Faith 7 Mercury Space Capsule is brought on board with Cooper still inside.
03 June 2014, 10:24 PM ET
This space wallpaper shows the dark and shadowed regions of the Moon that fascinate astronomers and Pink Floyd fans alike.
02 June 2014, 11:53 AM ET
Astronaut John Glenn dresses in his silver Mercury pressure suit preparing for his first orbit around Earth.
15 May 2014, 01:51 PM ET
Astronaut John Glenn inspects artwork to be painted on his Mercury spacecraft.
09 May 2014, 04:06 PM ET
Now is a great time for skywatchers in the Northern Hemisphere to view Mercury in the evening sky. This window will remain open through the end of May, giving you plenty of chances to see this so-called "elusive planet" with your own eyes.
05 May 2014, 10:00 AM ET
Alan B. Shepard, Jr., made the first U.S. manned spaceflight on May 5, 1961.
03 May 2014, 01:59 PM ET
Stargazers have a chance to see the five brightest planets in the May night sky, weather permitting. Here's how to see Jupiter, Saturn, Mercury
28 April 2014, 10:09 AM ET
Saturn is close and bright throughout 2014 but maybe best on May 10th ‘opposition,’ its moons visible with telescope. Mars shares the Eastern sky with the ringed gas giant. Skywatching Guide: http://goo.gl/uETMG9
23 April 2014, 03:49 PM ET
Skywatcher Victor Rogus of Jadwin, Missouri captured this wonderful image of 4 percent illuminated moon in conjunction with planet Mercury on Feb. 27, 2014. See how he did it.
16 April 2014, 06:32 AM ET
Explosive volcanic eruptions apparently shook and shaped Mercury's surface for billions of years, a new study finds, surprising scientists who had thought the phenomenon was impossible on the sun-scorched planet.
07 April 2014, 05:27 PM ET
Planets abound in the night sky this month, which affords good views of Venus, Jupiter and Neptune. And on Tuesday (April 8), Mars will make its closest approach to Earth in more than six years.
24 March 2014, 04:32 PM ET
Volunteers with no astronomy experience can pick out craters on the moon as accurately as a researcher with five to 50 years' experience, a new study reports. The finding could give a further boost to the use of citizen scientists in research projects.
17 March 2014, 06:26 PM ET
New information from NASA's MESSENGER solves the contradiction between the evidence of shrinking on the planet's crust and the models for heat loss in its core.
05 March 2014, 04:18 PM ET
Mercury, the elusive planet that orbits closest to the sun, makes an appearance this month in the dawn sky.
07 February 2014, 10:51 AM ET
A probe orbiting Mercury has beamed more than 200,000 images to ground controllers on Earth, and it's still going strong.
06 February 2014, 09:27 AM ET
The planets location in the nightsky are pinpointed (you'll need binoculars or a telescope to spot Uranus and Neptune). Also, Comet's Lovejoy, Siding Spring and Linear can be viewed.
31 January 2014, 12:46 AM ET
Scott Carpenter, one of the original Mercury astronauts, explored space and later the sea.
30 January 2014, 12:49 AM ET
Deke Slayton was selected for the Mercury program, but had to wait more than a decade to fly in space after concerns about an erratic heartbeat pulled him out of the flight rotation.
29 January 2014, 06:33 PM ET
Stargazers have the best chance of the year to spot Mercury in the evening sky over the next week, but only if you know how to find the elusive planet.
28 January 2014, 06:24 PM ET
Night sky photographer Chris Schur captured two rare shots of Venus and Mercury in the daytime sky from Payson, Ariz., in January 2014. See how he did it here.
27 January 2014, 12:43 PM ET
Photographer Justin Ng captured the glow of inner solar system dust scattering sunlight over 3 Indonesian volcanoes, the active Semeru and Bromo plus the dormant Batok. Planets Venus, Saturn and Mercury lie within this field of view.