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05 March 2015, 12:01 PM ET
About 4.5 billion years ago, the Red Planet was a much wetter place. New isotopic measurements of Mars by several ground-based telescopes on Earth reveal a new map of where the water laid and a model of water loss over time can be constructed.
05 March 2015, 07:18 AM ET
While NASA's Dawn probe will soon begin the first in-depth examination of Ceres, astronomers have learned a bit about the dwarf planet already. Here are seven weird facts about Ceres.
05 March 2015, 07:00 AM ET
A remote galaxy observed when the universe was less than a billion years old is more evolved than scientists expected.
05 March 2015, 07:00 AM ET
The European Space Agency's Rosetta spacecraft took the picture during a close flyby of Comet 67P/Churyumov-Gerasimenko on Feb. 14, when the sun, spacecraft and comet were all neatly aligned.
04 March 2015, 06:33 PM ET
March should be a great month for spotting planets for skywatchers, weather permitting. Venus is becoming increasingly more prominent in the evening sky, remaining above the horizon for 2.5 to 3 hours after the sun dips below the horizon
04 March 2015, 06:00 PM ET
The Stargazer Lottie doll — which comes with a realistic telescope, solar system collector cards and profiles of famous female astronomers — is being released this month in collaboration with the European Space Agency.
04 March 2015, 05:50 PM ET
Europe's Rosetta spacecraft recently beamed back an amazing photo of its comet taken during a risky, close flyby of the dusty cosmic body.
04 March 2015, 01:50 PM ET
Two astronauts in space said goodbye to a science fiction legend on Earth by beaming back striking photos from the International Space Station.
04 March 2015, 12:30 PM ET
Dark matter may be one of the greatest mysteries of the universe, but it could help solve a puzzle about the sun that has been baffling scientists for years, researchers say.
04 March 2015, 12:30 PM ET
Astronomers have watched a pulsar some 25,000 light-years from Earth slip from view, swallowed by a companion star's warp in the fabric of space-time. This wacky effect is one more example that proves Einstein's general theory of relativity.
04 March 2015, 10:01 AM ET
The constellation Gemini is currently well placed in the evening sky, just above and to the left of Orion for observers in the Northern Hemisphere. Here's how to see it.
04 March 2015, 07:22 AM ET
The car-size Curiosity rover suffered a "transient short circuit" on Feb. 27 while it was transferring sample powder from its robotic arm to instruments on the robot's body, NASA officials said.
04 March 2015, 07:19 AM ET
NASA is celebrating the 100-year anniversary of its predecessor, NACA — the National Advisory Committee for Aeronautics — and you can watch the celebration live online today (March 4).
04 March 2015, 07:00 AM ET
The Dawn mission's unprecedented deep-space feats are enabled by the probe's innovative propulsion system, which is about 10 times more efficient than traditional chemical thrusters, NASA officials say.
03 March 2015, 07:19 PM ET
Comet 67P/Churyumov–Gerasimenko is a small body visited by the Rosetta spacecraft in the first mission to land on a comet.
03 March 2015, 04:24 PM ET
Tech giant Google will give $1 million to Lick Observatory, a University of California, Berkeley facility that has been battling for funds since 2013, the observatory announced today (Feb. 10).
03 March 2015, 03:11 PM ET
When U.S. astronauts next launch to space from Florida, the control team that oversees their liftoff may celebrate with the traditional crock of beans. If so, they'll be honoring the legacy of test director Norm Carlson, too.
03 March 2015, 03:00 PM ET
Two stars, each more massive than our Sun but orbiting 100 times closer, affect each others gravity wells allowing astronomers to gauge space-time itself.
03 March 2015, 02:01 PM ET
"Star Wars" is about to get the LEGO treatment. Disney XD is planning to air "LEGO Star Wars: Droid Tales" later in 2015, according to a report from the Hollywood Reporter. The five-episode series will act as a re-telling of the six "Star Wars" films from
03 March 2015, 02:00 PM ET
Put six people into an isolated environment for months at a time, and lots of things can happen: frustration, conflict, or at best — a tight-knit group of people working happily for a common goal.
03 March 2015, 01:39 PM ET
As the moon moves around its monthly orbit of the Earth, it passes near or in front of a wide variety of objects. At some points in its orbit, there are almost no stars behind it.
03 March 2015, 01:10 PM ET
A network of amateur astronomers is responsible for identifying a truly mysterious phenomenon on the surface of Mars: a plume reaching so high above the surface of the Red Planet that it was visible from Earth.
03 March 2015, 12:45 PM ET
Jupiter's moon Europa suffers from extreme cold and deadly radiation, but its astronomical and geological sights are unique in the solar system.
03 March 2015, 12:00 PM ET
Scientists believe conditions may be right for life, under Europa's icy crust.
03 March 2015, 11:24 AM ET
Our civilization—and presumably any civilization with a technological capacity at least as advanced as ours—runs on energy and raw materials.
03 March 2015, 10:39 AM ET
Galaxy cluster Abel 1689 is so massive, light bends around it in an effect predicted by Einstein called a gravitational lens, revealing Galaxy A1689-zD1 to be surprisingly mature despite the young age of the universe seen.
03 March 2015, 08:47 AM ET
Scientists have found an early galaxy that produces more stars in a single day than the Milky Way creates in a year.
03 March 2015, 07:45 AM ET
NASA's Dawn will investigate Ceres' bright spots and other mysteries after it enters orbit around the dwarf planet at about 7:20 a.m. EST (1220 GMT) on Friday (March 6).
03 March 2015, 07:00 AM ET
While investigators continue to study the dramatic Feb. 3 death of the DMSP-F13 satellite, signs currently point to failure of the power system aboard the spacecraft, which launched in 1995.
02 March 2015, 05:19 PM ET
F. Curt Michel, an astrophysicist who was among NASA's first scientist-astronauts but who resigned after it became clear he would not fly to the moon, died Feb. 23, 2015. He was 80.
02 March 2015, 04:01 PM ET
A 20-year-old military weather satellite apparently exploded in orbit Feb. 3 following what the U.S. Air Force described as a sudden temperature spike.
02 March 2015, 04:00 PM ET
NASA's Dawn probe is scheduled to slip into orbit around Ceres — the largest object in the main asteroid belt between Mars and Jupiter — at 7:20 a.m. EST (1220 GMT) Friday, wrapping up a deep-space chase that lasted two-and-a-half years.