23 September 2013, 09:26 AM ET
The leading theory of the moon's origin holds that it was created when a mysterious planet slammed into Earth about 4.56 billion years ago. But new analyses of lunar rocks suggest that the moon is actually between 4.4 billion and 4.45 billion years old.
20 September 2013, 11:03 AM ET
A team of British researchers says a cell fragment found high up in Earth's atmosphere likely came from outer space. But such an extraordinary claim requires much more convincing evidence, outside scientists say.
20 September 2013, 10:03 AM ET
A proposed mathematical proof that outlines the way information behaves in coded messages may have implications for black holes. The proof suggests that the radiation spit out by black holes may retain information on the dark behemoths.
20 September 2013, 09:25 AM ET
Small, serpentine robots could help Mars rovers collect soil samples from crevices beneath rocks and other hard-to-reach places, and they could pull their wheeled siblings to safety if the bigger vehicles get bogged down in soft sand.
20 September 2013, 09:17 AM ET
Scientists have discovered colossal plasma arms reaching out from the nearby Coma Cluster of galaxies. The galactic tentacles are nearly five times the width of our Milky Way.
20 September 2013, 09:12 AM ET
The sun's insides churn much more quickly than previously thought, a new study shows, a finding expected to improve predictions of solar storms. Plasma flows are more complex and penetrate less deeply than scientists had thought.
19 September 2013, 04:45 PM ET
NASA's Mars rover Curiosity has revealed no trace of methane, a potential sign of primitive life, on the Martian surface, despite past observations of the gas by spacecraft orbiting the Red Planet and from Earth, researchers say.
19 September 2013, 03:39 PM ET
Although 2013 was expected to be a year of "Solar Maximum" activity, the Sun has gone disquietingly quiet. It's not a topic for worry, but it has solar scientists scratching their heads.
19 September 2013, 09:36 AM ET
Water, water everywhere, and some of it fit to drink. That’s the picture of ancient Mars that has emerged during the past few months thanks to discoveries by NASA's Curiosity rover, which has been exploring the Red Planet since August 2012.
18 September 2013, 07:10 PM ET
Earth could continue to host life for another 1.75 billion years, as long as nuclear holocaust, an errant asteroid or another disaster doesn't intervene. But even without such doomsday scenarios, astronomical forces will render the planet uninhabitable.
18 September 2013, 11:55 AM ET
Looking towards the constellation of Triangulum (The Triangle), in the northern sky, lies the galaxy pair MRK 1034 as seen in this space wallpaper.
18 September 2013, 11:40 AM ET
A small asteroid first discovered last Friday will whiz by the Earth today (Sept. 18), zipping closer than the orbit of the moon. The space rock poses no danger to Earth, scientists say.
17 September 2013, 12:19 PM ET
The celestial object known as 3552 Don Quixote is classified as an asteroid, but researchers have long believed it to be a "dead" comet stripped of its ices. But Don Quixote is actually a live, sopping wet comet, a new study reports.
17 September 2013, 10:43 AM ET
A new image from NASA's Hubble Space Telescope shows an enormous collection of galaxies and star clusters in stunning detail. Hubble spied 10,000 or so of the estimated 160,000 globular star groupings thought to reside in the galaxy cluster Abell 1689.
17 September 2013, 10:36 AM ET
A tiny asteroid discovered just last week is set to zip by Earth on Wednesday (Sept. 18), passing between our planet and the moon. It is small enough and distant enough that it poses no threat to people.
17 September 2013, 10:25 AM ET
The explosive collisions of icy comets with planets and moons generated the vital building blocks of life, spreading these necessary ingredients throughout the solar system, researchers say. Comets are known to possess organic compounds.
16 September 2013, 04:50 PM ET
High-speed streams of charged particles from the sun may be to blame for recent failures of satellites that people rely on to watch TV and use the Internet, a new study finds.
16 September 2013, 10:23 AM ET
A huge asteroid that wiped out the dinosaurs may not have been the only cosmic event to cause mass extinctions or change Earth’s climate.
16 September 2013, 09:13 AM ET
The NASA/ESA Hubble Space Telescope has captured this cool space wallpaper of nearby spiral galaxy Messier 61, also known as NGC 4303. In this image the galaxy is seen face-on as if posing for a photograph, allowing us to study its structure closely.
14 September 2013, 05:04 PM ET
What will life on Mars look like when the first settlers arrive?
12 September 2013, 05:15 PM ET
The big news that the spacecraft reached interstellar space on Aug. 25, 2012, after its decades-long sojourn begs the question: Just how far did it have to travel to knock on cold, dark space's door?
12 September 2013, 02:00 PM ET
New data from NASA’s Voyager 1 indicates the probe has left the influence of the Sun’s bubble of charged particles and entered true interstellar space, after a 36-year odyssey through the Solar System, across more than 11,253,000,000 miles.
12 September 2013, 09:44 AM ET
NASA's well-traveled Deep Impact spacecraft, which slammed a probe into one comet and then flew by another, may be drifting out of control in deep space and starving for power. Efforts to restore communication with the probe are underway.
12 September 2013, 09:33 AM ET
NASA has narrowed the list of candidates down to three space rocks for an ambitious mission to capture an asteroid and tow it to the moon, where it can be explored by astronauts. The three contenders were picked from a larger list of 14 objects.
11 September 2013, 05:59 PM ET
Evidence left over after the Big Bang may suggest a saddle-shaped universe.
11 September 2013, 05:07 PM ET
After a flawless launch from Virginia's eastern shore, NASA's next moon probe is looking good on its way to lunar orbit.
11 September 2013, 03:02 PM ET
TextureCam, a technology whose development is led by NASA's Jet Propulsion Laboratory, is designed to take pictures of rocks in 3-D and prioritize the ones that are most scientifically interesting.
11 September 2013, 11:49 AM ET
In this electrifying space wallpaper, taken on Friday June 7, 2013, a furious thunderstorm is discharging its mighty rage over Cerro Paranal.
10 September 2013, 02:05 PM ET
Using a powerful X-ray telescope, astronomers won a round of hide-and-seek with 10 supermassive black holes.
10 September 2013, 12:20 PM ET
Scientists have discovered unexpected ingredients for life — organic molecules never seen before in meteorites — inside a chunk of space rock that fell to Earth over California last year, scientists say.
10 September 2013, 11:48 AM ET
An early lunar probe's first glimpse of Earth and Soviet snapshots of the surface of Venus are among a treasure trove of historic Space Age images newly brought to life online.
09 September 2013, 09:09 AM ET
This space wallpaper is a scaled-down version of a full-circle view, which combined nearly 900 images taken by NASA's Curiosity Mars rover.