30 March 2011, 11:02 AM ET
NASA's Project Icebridge estimates show that Artctic sea ice has now melted back to 1/2 the size of the continental U.S. (3,717,813 sq mi). Scientists like Tom Wagner are investigating how much more will melt and when.
24 March 2011, 03:40 PM ET
Europe's GOCE mission to study the Earth's gravity field has begun a detailed analysis of the Earth's interior, shedding light on how continents move, to advance an early warning system for earthquakes.
24 March 2011, 01:59 PM ET
Structures thought of as the oldest known fossils of microbes might actually be microscopic mineral formations.
21 March 2011, 05:05 PM ET
Does our magnetic field really shield Earth from the solar wind?
18 March 2011, 01:34 PM ET
Scientists want to understand two complex bands of radiation in Earth's atmosphere.
16 March 2011, 02:01 PM ET
Satellite maps have been a vital part of relief efforts following Japan's devastating earthquake and tsunami.
11 March 2011, 03:13 PM ET
Black holes can pulse space itself making it resonate with gravitational waves. New and planned Earth-based detectors will rip such space songs for human ears. Hear how two dancing black holes would "sound".
10 March 2011, 12:00 PM ET
NASA's 34-year-old Voyager 1 probe is performing new tricks at the solar system's edge.
07 March 2011, 11:55 AM ET
NASA has shelved two high-priority climate satellite missions on White House orders to cut costs.
04 March 2011, 08:45 AM ET
A rocket carrying NASA's newest climate satellite Glory failed after liftoff.
04 March 2011, 08:18 AM ET
NASA's Glory mission fails to reach orbit after a fairing does not separate on March 4, 2011. Contingency investigation is underway.
03 March 2011, 02:02 PM ET
The dust grains that eventually coalesced into our solar system's planets nearly 4.6 billion years ago likely bounced around like pinballs over vast distances, new study suggests.
01 March 2011, 03:45 PM ET
Europe's Earth observation missions measure changes in sea level, ice thickness and soil moisture; then combine those data with 3 decades of satellite archives to refine predictive models.
28 February 2011, 11:46 AM ET
There will be two total lunar eclipses and four partial solar eclipses in 2011.
23 February 2011, 08:03 AM ET
The ins and outs of the Glory mission, NASA's newest climate satellite.
19 February 2011, 06:03 PM ET
There is work to be done to make sure Earth is prepared for the next solar storm.
17 February 2011, 05:08 PM ET
The sun unleashed its most powerful eruption in more than four years this week, but it could have been a lot worse, experts say. The sun's space weather cycle have serious impacts on Earth.
17 February 2011, 11:52 AM ET
A whopper of a solar flare that fired up earlier this week is wreaking havoc on radio communications and power grids on Earth, and could spark exceptional auroras soon.
17 February 2011, 07:00 AM ET
Astronomical detectives have assembled a stellar lineup, identifying nearby stars that may come close enough to disrupt our solar system in the next billion years or so.
15 February 2011, 09:37 PM ET
A fireball lit up the daytime sky over much of the eastern United States yesterday (Feb. 14), causing necks to crane and jaws to drop from Maryland to Massachusetts.
11 February 2011, 05:02 PM ET
New images show dramatic auroras – flares of ultraviolet light – streaming from the planet Jupiter.
10 February 2011, 04:42 PM ET
Have you ever wondered why most star patterns are associated with specific seasons of the year? Here's why.
09 February 2011, 08:48 AM ET
The huge clouds of material erupting from the sun may share at least one feature with the fluffy white clouds scudding through Earth's skies — ripples of instability along one flank.
09 February 2011, 08:09 AM ET
NASA is preparing to launch its newest Earth-observing satellite that will monitor how the sun and tiny atmospheric particles called aerosols affect Earth's climate.
01 February 2011, 08:11 PM ET
See photos from the first solar eclipse of 2011 on Jan. 4.
01 February 2011, 01:37 PM ET
A flotilla of NASA space probes has tracked the origin of the energetic particles in Earth's magnetic atmosphere, finding they gain extra energy far from the "substorms" that spawn them.
01 February 2011, 10:00 AM ET
A Q & A with astronomer Geoff Marcy, who has had a hand in discovering more alien planets than anybody else.
26 January 2011, 11:06 AM ET
As a mock mission to Mars nears its halfway point, astronauts are preparing for a simulated "landing" on the Red Planet.
25 January 2011, 05:54 PM ET
Starting next week, NASA's Mars rover Opportunity will get a temporary respite from its bossy operators here on Earth. But the rover won't be able to slack off.
10 January 2011, 10:24 PM ET
Powerful thunderstorms on Earth can hurl beams of antimatter into space.
10 January 2011, 05:20 PM ET
The newly discovered Kepler-10b isn't the first alien planet that astronomers have announced is rocky. But they're more sure about Kepler-10b's composition than they've been before, because they know its host star so well.
07 January 2011, 09:45 AM ET
The sky is full of stars and galaxies, but eagle-eyed skywatchers can also spot satellites, space shuttles and stations from Earth too. Take a look at some of the best photos of spaceships caught on camera.
04 January 2011, 04:54 AM ET
ESA previews a very busy 2011 with a new Soyuz launchpad, traveling back in time with the Planck satellite images release, new climate change data from Earth Explorer missions & the launch of the first 2 satellites for the Galileo constellation.
28 December 2010, 03:37 PM ET
Strong support from the White House and U.S. Congress will allow NASA to lay the groundwork for a vigorous and extensive Earth science program that includes 16 major missions scheduled for launch between 2011 and 2021, an agency official said.
28 December 2010, 01:39 PM ET
This week, for the third time in eight months, Jupiter has a close encounter with Uranus.
24 December 2010, 06:53 AM ET
Before gathering around their foot-tall Christmas tree and tucking into some rehydrated turkey, astronauts aboard the International Space Station sent some Christmas greetings to Earth.