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.
20 December 2013, 12:30 PM ET
Beatles legend John Lennon, "Breakfast at Tiffany's" author Truman Capote and sculptor Alexander Calder are among the 10 artists and writers now immortalized on Mercury with impact craters bearing their names.
06 December 2013, 05:53 PM ET
A volcano on Mercury may have been active over an unprecedented billion-year time span.
26 November 2013, 05:05 PM ET
NASA's STEREO-A spacecraft has had its eyes set on the comet for the past few days and has delivered the best time-lapse to date. Comet ISON and the smaller Comet Enke, along with Earth and Mercury can be seen. (looped 3X)
25 November 2013, 07:16 PM ET
If you look to the sky early Tuesday (Nov. 26) morning, you might get a view of what can only be described as a "double planet" visible through the brightening dawn twilight.
22 November 2013, 10:06 AM ET
As the possible 'comet of the century' (ISON) nears the Sun, it has come within the viewing range of the NASA Sun observing satellite. Earth, Mercury and the further away Comet Enke were all visible to the spacecraft on Nov. 21, 2013. (looped)
19 November 2013, 11:35 AM ET
The planet Mercury is known in some circles as the "elusive planet," but over the next two weeks, skywatchers will have an excellent opportunity to see Mercury in the early morning dawn sky.
17 November 2013, 07:30 AM ET
NASA's MESSENGER probe will watch as comets Encke and ISON cruise by Mercury on Monday and Tuesday. The back-to-back close passes offer a golden opportunity to study two comets passing close to the sun, researchers say.
15 November 2013, 07:01 PM ET
NASA's MESSENGER spacecraft will have its eyes set on Comet's ISON and Encke as they fly-by Mercury on Nov 18 and 19th, 2013. The Mercury probe will analyze the chemical makeup of the comets and snap pictures.
15 November 2013, 03:19 PM ET
A NASA probe in orbit around Mercury spotted and photographed two comets set for close brushes with the sun this month.
13 November 2013, 05:18 PM ET
This week in the hour before sunrise early morning stargazers will get a double treat: the planet Mercury and two special comets.
08 November 2013, 03:57 PM ET
On 4 October 2013, NASA acquired 560+ images from the MESSENGER spacecraft orbiting Mercury. Hundreds of miles of scorched, asteroid impacted surface have been compiled and set to the 'HI-FI SCI-FI' sounds of Atom Strange.
01 November 2013, 05:06 PM ET
You can expect to see Venus, Jupiter, Mars, Mercury and Saturn this November with only an average telescope.
16 October 2013, 10:58 AM ET
Just like the moon, Mercury is a desolate, rocky and airless body, albeit a bit bigger than Earth's satellite, said Sean Solomon, the principal investigator for NASA's Messenger mission to Mercury.
10 October 2013, 05:08 PM ET
See photos from Mercury astronaut Scott Carpenter's historic Aurora 7 orbital flight on May 24, 1962.
04 October 2013, 03:49 PM ET
The moon will meet up with three different planets in the evening sky during two separate celestial encounters, one on Sunday and the other on Tuesday. The first will involve Saturn and Mercury, while Venus is the moon's partner for the second.
18 September 2013, 07:39 PM ET
Canopus is the second-brightest star in the night sky despite its distance from Earth.
29 August 2013, 05:11 PM ET
NASA's Jet Propulsion Laboratory's former director talks about the mission that completed fly-bys of Venus and Mercury in the 1970's.