29 February 2012, 05:55 PM ET
The moon, or any object, can be measured by diameter or mass.
29 February 2012, 02:04 PM ET
The movie voice of the leader of the Transformers (Peter Cullen) narrates this NASA promotional film.
29 February 2012, 09:16 AM ET
Here are some of the highlights in the night skies over the next year.
28 February 2012, 11:55 AM ET
The results point to increased velocities of the asteroids that bombarded the moon 4 billion years ago.
28 February 2012, 05:21 AM ET
Matt Hartman captured Venus, Jupiter and the Moon on the move in this time-lapse. Recorded on February 25th, 2012.
27 February 2012, 12:54 PM ET
Roberto Porto captured this incredible imagery of Venus, Jupiter and the Moon (seen on the horizon) on the road to Teide National Park in Tenerife, Spain. Taken on February 24, 2012.
27 February 2012, 12:32 PM ET
Jupiter and Venus lined up with the moon, and will get even closer together in March.
27 February 2012, 12:31 PM ET
See amazing photos of Venus, Jupiter and the moon in a celestial triple conjunction.
25 February 2012, 12:02 PM ET
Venus, Jupiter and Mercury can be seen near the moon at sunset. Mars makes an appearance.
24 February 2012, 11:58 AM ET
Jupiter, Venus and the crescent moon will shine extra bright just after sunset in the western sky this weekend.
23 February 2012, 02:47 PM ET
The Slooh Space Camera will webcast the action live on Feb. 25 and 26.
22 February 2012, 12:33 PM ET
NASA's New Horizons Pluto mission team is hoping for 100,000 signatures by March 13.
22 February 2012, 11:17 AM ET
A reflection nebula is a cloud of dust visible with the help of energy from a nearby star or stars.
22 February 2012, 10:51 AM ET
NASA's Solar Dynamics Observatory snapped the footage Tuesday.
21 February 2012, 07:33 AM ET
High resolution imagery provided by NASA's Lunar Reconnaissance Orbiter has shown that small valleys in some parts of the moon are slowly forming. This suggests that the moon's crust is expanding is some areas.
17 February 2012, 01:45 PM ET
Avid astrophotographer Tamas Ladanyi snaps stunnning image of 22 degree halo.
15 February 2012, 11:00 AM ET
See amazing full moon photos from skywatchers and photographers of the February 2012 full moon.
10 February 2012, 12:58 PM ET
The crew of the International Space Station caught this phenomenal view of the Moon setting over the Atlantic Ocean on January 9th, 2012.
08 February 2012, 11:53 AM ET
A celestial show will be on offer for skywatchers this week.
01 February 2012, 04:58 PM ET
NASA's Grail probes have returned their first view of the far side of the moon.
01 February 2012, 04:36 PM ET
The petition hopes to collect 100,000 signatures by March 13.
31 January 2012, 06:00 AM ET
One of the brightest objects in the sky, Venus is visible from Earth because it is close to the orbit of the sun.
30 January 2012, 03:45 PM ET
Newt Gingrich promises a lunar colony in less than a decade, but experts question whether it's possible.
28 January 2012, 07:00 AM ET
A waxing crescent moon will pay a visit to Jupiter in the evening sky.
27 January 2012, 09:18 PM ET
See images of the moon and Venus close together.
27 January 2012, 10:23 AM ET
The asteroid 2012 BX34 came within 36,750 miles of Earth.
26 January 2012, 04:31 PM ET
Asteroid 2012 BX34 won't hit us, experts say.
26 January 2012, 02:01 PM ET
Researchers are still unclear about what might have powered this ancient lunar magnetic field.
24 January 2012, 03:33 PM ET
A celestial convergence is set to take place this week.
24 January 2012, 07:00 AM ET
Dunes on the huge moon vary according to latitude and elevation.
20 January 2012, 03:12 PM ET
China targets 2013 for launch of a lunar landing mission.
19 January 2012, 02:34 PM ET
Russia is in discussions with NASA and the European Space Agency, according to news reports.
19 January 2012, 01:35 PM ET
New Horizons is zooming toward a close encounter with Pluto in 2015.
19 January 2012, 10:28 AM ET
A NASA satellite found ice where the sun doesn't shine.
17 January 2012, 01:10 PM ET
The names were suggested by students competing in a nationwide NASA contest.
17 January 2012, 09:45 AM ET
The new names for the twin Grail moon probes were selected from a nationwide student contest.