25 February 2013, 03:10 PM ET
McKay helped train the Apollo moonwalkers and led a study that claimed a Mars meteorite may contain signs of past life.
20 February 2013, 06:36 PM ET
There's plenty to see now on Earth's nearest neighbor.
11 February 2013, 11:09 AM ET
Find out when and where to look for the pink-looking planet.
26 January 2013, 09:30 AM ET
Moon Astronomy Lesson: Learn more about moon phases, a waxing and waning crescent or gibbous moon and the lunar cycles of Earth’s moon each month at SPACE.com.
24 January 2013, 07:12 AM ET
Distances driven by wheeled vehicles on the Moon and Mars.
22 January 2013, 09:31 AM ET
Matt Hartman captured Earth's Moon and the Gas Giant in close skywatching proximity on January 21st, 2013.
18 January 2013, 06:26 AM ET
Night sky photographer Scott McGuire snapped this stunning photo of the space station full moon over Half Dome at Yosemite National Park.
17 January 2013, 01:48 PM ET
A digital image of Leonardo da Vinci's painting became the first transmission via laser to a satellite in lunar orbit. Lasers offer a more efficient way to 'talk' with spacecraft. The beam traveled ~240,000mi to NASA's Lunar Reconnaissance Orbiter.
17 January 2013, 07:00 AM ET
There are good scientific and ethical reasons to protect parts of Mars and other celestial bodies, advocates say.
14 January 2013, 05:17 PM ET
NASA's Ebb spacecraft recorded the video three days before crashing into the lunar surface.
13 January 2013, 03:37 PM ET
Three days prior to its impact into a mountain on the moon, one of the twin spacecraft (named Ebb) from NASA's GRAIL mission took some photos from orbit. The spacecraft was about 6 miles above the lunar surface when the photos were take.
11 January 2013, 10:00 AM ET
Venus and a crescent moon provided a dazzling sight for stargazers Thursday (Jan. 10).
05 January 2013, 11:00 AM ET
Skywatchers up before dawn Sunday can watch a celestial dance unfold.
03 January 2013, 01:06 PM ET
Were the famed astronaut's first words on the moon scripted or ad-libbed?
31 December 2012, 07:00 AM ET
Experts weigh in on NASA's direction and its ultimate goals of sending astronauts into deep space.
31 December 2012, 07:00 AM ET
Night sky photographer Tamas Ladanyi shoots stunning image of the moon and Jupiter over a lake in Hévíz.
28 December 2012, 09:38 AM ET
NASA points out a few things to keep an eye out for when looking skyward in January.
27 December 2012, 11:10 PM ET
This cool space wallpaper from the APEX telescope, of part of the Taurus Molecular Cloud, shows a sinuous filament of cosmic dust more than ten light-years long.
24 December 2012, 06:56 AM ET
The two heavenly bodies will dance close together Tuesday night.
21 December 2012, 11:17 AM ET
The gas giant and Earth's Moon will provide some holiday lights in the eastern sky on December 25th, 2012 (at sunset). Seen through a telescope, Jupiter's great red spot and its moons will be visible as well.
20 December 2012, 03:22 PM ET
Being developed for missions in 2015 and beyond, the Z-1 could be used for exploring the moon and Mars.
18 December 2012, 10:41 AM ET
The engineers who built NASA's Grail spacecraft gathered to watch the probes' demise.
17 December 2012, 06:32 PM ET
Ride had led Grail's MoonKAM project, which allowed kids to choose sites for the spacecraft to photograph.
17 December 2012, 01:01 PM ET
A night sky photographer took these stunning photos of Jupiter and the moon in conjunction.
17 December 2012, 06:00 AM ET
NASA TV will provide commentary, but the impact itself will probably not be visible.
14 December 2012, 11:45 AM ET
It's been 40 years since Apollo 17 blasted off the surface of the moon.
14 December 2012, 10:07 AM ET
The remains of at least 71 space vehicles litter the surface of the moon.
13 December 2012, 01:56 PM ET
NASA's Gravity Recovery and Interior Laboratory (GRAIL) mission's spacecrafts Ebb and Flow will end their successful mission on on December 17th at 5:28pm EST.
13 December 2012, 01:33 PM ET
The Grail spacecraft will go out in style on Dec. 17.
12 December 2012, 11:34 AM ET
In this video, the K10 robot rover laying down Kapton (polyimide) film in a test of a future lunar radio telescope, which would be able to study the early Universe without the usual interference ground based Earth telescopes are subject to.
11 December 2012, 10:51 AM ET
The Grail spacecraft will go out in style Dec. 17.
10 December 2012, 03:03 PM ET
A waning crescent moon will glow alongside the brightest of all the planets.
07 December 2012, 04:59 PM ET
Look up for three nights starting this Sunday to see the moon, Saturn and Spica together.
07 December 2012, 07:00 AM ET
Harrison Schmitt remembers the mission like it was yesterday.
06 December 2012, 04:01 PM ET
The private company announced commercial passenger flights to the moon starting in 2020.
06 December 2012, 03:39 PM ET
Sending humans far afield demands a dedicated agency, says former moonwalker Harrison Schmitt.