27 March 2015, 07:01 PM ET
Known to many as "G2," the unidentified object making a loop around the monster black hole at the center of our galaxy could be a cloud of gas, or it could be a star, depending on who you ask.
27 March 2015, 06:05 PM ET
An American astronaut and Russian cosmonaut launched into space Friday to attempt something their two countries have never done together before: a one-year mission on the International Space Station that could help one day send humans to Mars.
20 March 2015, 11:35 PM ET
Gamma-rays are a form of electromagnetic radiation. They can be used to treat cancer, and gamma-ray bursts are studied by astronomers.
18 March 2015, 02:08 PM ET
Green auroras danced in skies around the world last night thanks to a massive solar storm that super-charged the cosmic light displays for St. Patrick's Day.
18 March 2015, 09:12 AM ET
In just a matter of days, Richard III will get a long-overdue royal burial in Leicester, England. The last time the king's body was laid to rest, more than 500 years ago, a "blood moon" might have shone over his naked, heavily wounded corpse.
18 March 2015, 07:53 AM ET
A bizarre crystal-like mineral recently found in a meteorite that crashed to Earth 15,000 years ago adds more support for the idea that the fragile structure can survive in nature. But how it formed at the beginning of the solar system is still a mystery.
17 March 2015, 07:02 PM ET
A massive solar storm is bombarding Earth today (March 17), sparking stronger than normal auroras for St. Patrick's Day. The solar storm poses no threat to satellites, but may affect GPS and radio signals.
12 March 2015, 10:03 PM ET
Amazing views from 1947 to 2012, including several firsts.
12 March 2015, 10:05 AM ET
The Magnetospheric Multiscale mission, which will study a cosmic phenomenon that is both dazzling and dangerous for people on Earth, is scheduled to launch into orbit on Thursday (March 12).
06 March 2015, 09:11 AM ET
Ancient Mars likely once had an ocean large enough to cover 20 percent of the Martian surface, a fifth of the planet, scientists say. But over time, most of that water was lost to space.
05 March 2015, 03:27 PM ET
The famous theory, which Einstein published in 1915, remains the bedrock upon which scientists' understanding of the origin and evolution of the universe rests.
27 February 2015, 02:51 PM ET
Actor Leonard Nimoy, who portrayed the beloved Vulcan 'Spock' on the original "Star Trek" TV show, died today (Feb. 27) at 83 years old.
27 February 2015, 10:19 AM ET
Mesmerizing and swirling animations of rain and snow dance across a map of the Earth, shown in a video released yesterday (Feb. 26) by NASA's Global Precipitation Measurement (GPM) mission.
26 February 2015, 08:43 AM ET
A new way to reconcile quantum mechanics and general relativity could imply that the age of the universe is infinite, and that there was no true Big Bang that started it all.
25 February 2015, 09:51 AM ET
After two centuries of arguing about its origin, geologists have finally confirmed that Hummeln Lake in southern Sweden is an impact crater.
24 February 2015, 12:55 PM ET
For more than 50 years, scientists have been scanning the heavens for signals that may have been generated by intelligent alien life. Some researchers are advocating that we beam out signals of our own designed to catch aliens' eyes as well.
24 February 2015, 09:36 AM ET
DARPA’s Airborne Launch Assist Space Access program (ALASA) plans to create low cost (less the 1 millions dollars per launch.) alternative for small satellite launches.
19 February 2015, 02:19 PM ET
The 149th crew to "explore" the Red Planet care of the Mars Desert Research Station has made some interesting discoveries — not all what you would expect.
19 February 2015, 01:56 PM ET
In a Mars environment, it appears even brewing may be possible.
19 February 2015, 07:06 AM ET
Clouds are interrupting the natural night cycles of the moon and stars. Because of light pollution, when clouds roll in at night, cities brighten instead of growing darker, researchers find.
11 February 2015, 10:00 AM ET
The universe is smiling today — at least, that's what it looks like in a new space photo that appears to feature a smiling face emerging from the light of the universe.
09 February 2015, 12:55 PM ET
Neil Armstrong had a secret stash of moon landing mementos. The first man to walk on the moon kept a bag full of small parts from the lunar module that he and his Apollo 11 crewmate Buzz Aldrin famously piloted to a landing at Tranquility Base in 1969.
09 February 2015, 12:52 PM ET
Evidence provided by pulverized rocks offers the most comprehensive view yet of Alamo crater, the most accessible impact crater in North America.
04 February 2015, 11:40 AM ET
New research finds methane in rock that had been buried perhaps 12 miles (19 kilometers) underground millions of years ago.
03 February 2015, 09:52 AM ET
Orange bubbles, blue patches, and red wisps of light dance in this NASA/ESA Hubble Space Telescope photo toward the constellation of Taurus.
30 January 2015, 12:50 PM ET
Seven thousand year-old rock paintings in the Sahara desert have, somewhat serendipitously, helped uncover evidence of ancient lake beds.
30 January 2015, 12:08 PM ET
ETs may be tiny, but we'll find them.
29 January 2015, 06:54 AM ET
Building a quantum computer can sometimes yield unexpected benefits — like providing the right environment to demonstrate that Albert Einstein's theory of special relativity is, in fact, correct.
29 January 2015, 06:52 AM ET
Astronaut Samantha Cristoforetti captured a jaw-dropping photo of Cyclone Bansi from the International Space Station.
28 January 2015, 03:33 PM ET
New research claims to have solved a messy paradox that has plagued geoscientists who study Earth's core and its life-protecting magnetic field.
27 January 2015, 12:48 PM ET
A "faster-than-light" experiment could be a real-world tool for studying the cosmos, according to research presented this month at the 225th American Astronomical Society meeting in Seattle.
26 January 2015, 12:31 PM ET
A huge asteroid will become the largest space rock of its kind to pass closest to Earth until 2027 today (Jan. 26) when it zooms safely by Earth beyond the orbit of the moon. You can see the space rock's flyby live online.
23 January 2015, 09:47 AM ET
Using laser blasts, scientists have recreated the extreme temperatures and pressures found inside "super-Earth" exoplanets as well as in icy giants such as Neptune and Uranus, shedding light on what the interiors of these exotic worlds are like.
21 January 2015, 12:12 AM ET
NASA's Dawn spacecraft has captured amazing new images of the dwarf planet Ceres ahead of the probe's March 6 arrival at the giant space rockk. See the images here.
20 January 2015, 11:48 PM ET
A new alien-planet–hunting telescope has just come online in Chile, and it could help scientists peer into the atmospheres of relatively small planets circling nearby stars.
16 January 2015, 03:05 PM ET
Dark matter and dark energy can't be seen, but that doesn't mean they don't yield stunning images.