21 November 2015, 12:42 AM ET
This image of the Milky Way from the edge of the Grand Prismatic Spring in the Midway Geyser Basin in Yellowstone on June 27, 2015.
21 November 2015, 12:23 AM ET
A sudden spurt of liquid water on Mars could potentially create deep lakes today, new research suggests.
19 November 2015, 11:49 PM ET
How can Einstein's theories meld with the odd observations of the quantum world?
19 November 2015, 06:29 PM ET
Abraham Lincoln is best-known for abolishing slavery and keeping the United States together through the Civil War, but he also helped the country become the scientific and engineering powerhouse we know today.
16 November 2015, 04:39 PM ET
Pluto's the prettiest dwarf planet at the party in this new, brilliantly colored image recently released by NASA.
12 November 2015, 02:03 PM ET
A new study delivers the first evidence that water in ancient dust grains collected at the heart of an infant Earth during its formative years.
11 November 2015, 01:31 PM ET
The western lobe of Pluto's "heart" is surprisingly young — no more than 10 million years old — and the dwarf planet's atmosphere is surprisingly compact. The latest research from the New Horizons mission continues to reveal surprises from the dwarf plane
11 November 2015, 01:16 PM ET
A "zombie" star and the remains of its lunch are revealed in a new close-up view, 12 years in the making.
05 November 2015, 10:49 AM ET
Earth's chemical composition is drastically different from that of the rocks that helped to form the planet. Now, scientists think they may know why: The constant pummeling that formed Earth may have altered its composition.
05 November 2015, 10:17 AM ET
Dark matter particles may have interacted often with normal matter long ago, when the universe was very hot, a new study suggests.
02 November 2015, 01:33 PM ET
On Thursday (Oct. 29), the White House released two documents that lay out the nation's official plan for mitigating the negative impacts of solar flares and other types of "space weather."
31 October 2015, 08:48 PM ET
In space, no one can hear you litter (but that doesn't mean it's a good idea).
31 October 2015, 12:18 AM ET
The powerful X-ray flares seen erupting from supermassive black holes are tied to the motion of these behemoths' surrounding "coronas," mysterious features that are sources of high-energy light, a new study suggests.
30 October 2015, 11:58 PM ET
A star is dimming for reasons that astronomers can't explain. Is it an alien megastructure? What sort of alien megastructures would be possible?
28 October 2015, 10:27 AM ET
Astronomers around the world are keeping a close eye on a mysteriously dimming star, and their observations could soon shed light on whether it is indeed surrounded by some sort of "alien megastructure."
24 October 2015, 12:45 PM ET
The planet-destroying Death Star from "Star Wars" may be fictional, but a star at the end of its life and only a bit bigger than Earth could be its real-world twin: the star is currently destroying and disintegrating an orbiting planet bit by bit.
23 October 2015, 04:13 PM ET
The big asteroid 2015 TB145, which will cruise within 300,000 miles (480,000 kilometers) of Earth on Halloween (Oct. 31), may actually be a comet, NASA researchers say.
20 October 2015, 12:30 PM ET
Astronomers are using the Allen Telescope Array (ATA), a system of radio dishes about 300 miles (483 kilometers) northeast of San Francisco, to hunt for signals coming from the vicinity of KIC 8462852, a star that lies 1,500 light-years from Earth.
16 October 2015, 10:29 AM ET
The sun has sprung a leak: A hole in the topmost layer of the sun and its magnetic field, the size of 50 Earths, is letting loose an ultrafast solar wind that has kicked off several nights of auroras down on Earth.
15 October 2015, 03:24 PM ET
Exotic particles such as dark matter could allow the formation of tunnels that cut through space-time. These so-called wormholes could be used to travel not only across the universe but also through time.
14 October 2015, 05:52 PM ET
The new OPAL program allowed the Hubble Space Telescope to capture breathtaking images of Jupiter, revealing the slowdown in the shrinkage of its Great Red Spot and a rare feature that hasn't been spotted for decades.
13 October 2015, 11:54 AM ET
Just as the moon's gravitational pull causes seas and lakes to rise and fall as tides on Earth, the Earth exerts tidal forces on the moon. Scientists have known this for a while, but now they've found that Earth's pull actually opens up faults on the moon
09 October 2015, 02:19 PM ET
Growing food on Mars would require tweaking the thin soil and optimizing plants for microgravity and maximum nutritional density, one expert says.
08 October 2015, 05:51 PM ET
A new photo beamed home by NASA's New Horizons spacecraft, which performed history's first flyby of Pluto this past July, reveals that the dwarf planet's skies have an azure tinge.
08 October 2015, 05:36 PM ET
A series of freshwater lakes within Mars' 96-mile-wide Gale Crater likely persisted for hundreds or thousands of years at a time, and perhaps even longer, according to the new study, which is based on observations made by NASA's Curiosity rover.
08 October 2015, 12:05 PM ET
Our universe is actually really simple, it's just our cosmological theories that are getting needlessly complex, argues one of the world's leading theoretical physicists.
03 October 2015, 12:00 AM ET
NASA has been helping promote the new film "The Martian," which hits theaters across the United States today (Oct. 1), as a way to publicize its own plans to send astronauts to the Red Planet in the 2030s.
02 October 2015, 11:38 PM ET
The new maps from NASA's Dawn mission highlight the compositional and topographic differences across Ceres, the largest object in the main asteroid belt between Mars and Jupiter.
30 September 2015, 06:00 AM ET
How, exactly, were scientists able to prove that briny water can be found on Mars?
30 September 2015, 05:57 AM ET
The dusty-red sphere now called Mars has fascinated stargazers since the dawn of humanity, but Earthlings' view of the planet has changed drastically over the years.
29 September 2015, 11:38 AM ET
Scientists recently announced they had discovered flowing water on Mars, boosting the odds of extraterrestrial life, but why is water so essential to life in the first place?
28 September 2015, 11:53 AM ET
The enigmatic dark streaks called recurring slope lineae (RSL) that appear seasonally on steep, relatively warm Martian slopes are probably caused by salty liquid water, researchers said.