24 April 2015, 07:07 AM ET
The Hubble Space Telescope is celebrating its 25th anniversary. Here are some of the most amazing photos taken by the iconic observatory.
20 April 2015, 08:41 PM ET
When the land is untouched, so is the nighttime sky.
15 April 2015, 05:53 PM ET
A key ingredient of the early Earth may have been a chunk of rock much like Mercury, scientists say. This finding could help explain how Earth's magnetic field has lasted for billions of years, researchers added.
15 April 2015, 12:30 PM ET
NASA's New Horizons mission to Pluto has returned its first color image of the dwarf planet and its largest moon, Charon. The new photo was taken on April 9, from a distance of about 71 million miles (115 million kilometers).
14 April 2015, 03:02 PM ET
The dark universe is coming into view, thanks to new maps that chart the location dark matter in the cosmos. The new maps, released today, show how dark matter affects the landscape of regular matter, and provides hints about dark energy.
14 April 2015, 10:36 AM ET
Ground-based and Hubble images of Pluto suggest it might be the reddest object in the Solar System. New Horizons' Principal Investigator Alan Stern explains how this could have happened.
09 April 2015, 01:34 AM ET
A new photograph of a distant galaxy looks like it was the inspiration for the 'one ring' in 'The Hobbit,' but it's actually a cosmic phenomenon in which the light from one galaxy is bent into a circle by the gravity of another galaxy.
08 April 2015, 03:33 PM ET
A cracking fireball that exploded over Russia last year appears to share an orbit with a huge asteroid discovered in October 2014.
08 April 2015, 12:13 PM ET
Solid signs of alien life will be spotted within 10 years, and definitive evidence will roll in within 20 to 30 years, NASA chief scientist Ellen Stofan said Tuesday (April 7).
03 April 2015, 06:55 PM ET
Don't forget to look skyward in the early hours of the morning tomorrow (April 4), to catch a glimpse of the shortest total lunar eclipse of the century, and the third of a four-eclipse "tetrad" visible from the United States.
01 April 2015, 05:09 PM ET
The astronauts living and working on the International Space Station are eye to eye with a deadly super typhoon as it heads toward the Philippines.
01 April 2015, 09:28 AM ET
Ancient Mars may have featured oceans with huge, slow-moving waves. Studying the shorelines these waves may have carved could shed light on the ancient Martian climate, such as whether or not it had seas long enough for life to potentially develop.
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.