07 January 2015, 12:12 PM ET
NASA's Kepler Space Telescope has discovered its 1,000th alien planet, further cementing the mission's status as a space-science legend. Kepler has found more than half of all known exoplanets to date, and the numbers will keep rolling in.
06 January 2015, 04:04 PM ET
06 January 2015, 11:24 AM ET
Amazing new images of the Eagle Nebula's iconic Pillars of Creation from the Hubble Space Telescope reveal how the nebula has changed 20 years after Hubble's first photo of the region.
06 January 2015, 11:17 AM ET
NASA has proposed a new citizen science challenge called the 20-20-20 Airship Challenge that calls for high-altitude and long-duration airship designs.
02 January 2015, 02:56 PM ET
Stargazers can start the New Year off with a bang this weekend as the first meteor shower of 2015 reaches its peak on Saturday night (Jan. 3). Here's how to see the 2015 Quadrantid meteor shower.
29 December 2014, 06:14 AM ET
The past year has been a boom time for the commercial spaceflight industry, but alongside the successes have come failures, even tragedies.
24 December 2014, 03:00 PM ET
Everyday problems — and even major political and cultural conflicts — seem a lot smaller when you're watching them play out from 250 miles above Earth's surface.
23 December 2014, 03:10 PM ET
The new image, which was taken by the NuSTAR spacecraft, is the best-ever view of the sun in high-energy X-ray light. The photo, and others taken by NuSTAR in the future, should help researchers learn more about our star, researchers said.
20 December 2014, 03:35 AM ET
The technology of the future can't wait.
19 December 2014, 12:38 PM ET
The first-ever soft landing of a robotic probe the surface of a comet has just been named the top scientific breakthrough of 2014 by the journal Science.
19 December 2014, 11:20 AM ET
Near-Earth objects about the size of the Chelyabinsk meteor shower could potentially be detected by their interaction with solar wind as they travel through space.
18 December 2014, 04:57 PM ET
NASA scientists unveiled the first data sets from the Orbiting Carbon Observatory-2, or OCO-2.
16 December 2014, 09:57 AM ET
The new image shows "ultra-luminous X-ray sources" (ULXs) studding the spiral galaxies NGC 2207 and IC 2163, which are grazing each other about 130 million light-years from Earth, in the constellation Canis Major.
11 December 2014, 08:48 AM ET
Astronauts released a tiny satellite from the International Space Station last month that will be used as a testbed for a future "space surveillance network," according to the U.S. Naval Research Laboratory.
10 December 2014, 02:45 PM ET
A meteorite that crashed down in California's gold country is showing off treasures of a different sort: small diamonds that could tell scientists more about the insides of asteroids.
09 December 2014, 12:01 PM ET
Curiosity has found evidence that the 96-mile-wide (154 kilometers) Gale Crater, which the rover has been studying since August 2012, hosted a large lake long ago. Runoff into this lake eventually built up Mount Sharp, mission scientists say.
05 December 2014, 10:15 AM ET
It's the spacecraft NASA has been waiting for. The space agency's new capsule, designed to help deliver humans to deep space destinations such as Mars someday, has just launched on its rigorous first test flight.
03 December 2014, 04:44 PM ET
A debate has long raged among scientists over the possible existence of life on Mars, and a new study is adding fuel to the fire.
03 December 2014, 09:33 AM ET
When NASA rockets its Orion spaceship high above the Earth's atmosphere on Thursday, the space-bound aircraft won't be alone.
02 December 2014, 11:27 AM ET
NASA's Orion space capsule is scheduled to travel 3,600 miles from Earth on Dec. 4, then rocket back to Earth to test out a variety of systems during an unmanned flight. No human-spaceflight vehicle has traveled so far since 1972.
01 December 2014, 10:18 AM ET
Astronomers are searching for gravitational waves possibly emitted by "strange stars," superdense objects made of exotic matter.
24 November 2014, 10:10 PM ET
A massive population of stars is missing, and scientists are stumped as to where it could be.
24 November 2014, 10:01 PM ET
While wormholes are possible according to Einstein's theory of general relativity, it's unlikely that people will ever be able to travel through one, said renowned astrophysicist Kip Thorne of the California Institute of Technology in Pasadena.
21 November 2014, 12:10 PM ET
The sun may be partly responsible for lightning strikes on Earth, and scientists think fluctuations in the sun's magnetic field could be used to predict lightning storms weeks in advance.
19 November 2014, 06:36 PM ET
The region appears to be covered by a gray-white blanket in the image, which was captured in infrared light Tuesday morning (Nov. 18) by the National Oceanic and Atmospheric Administration's (NOAA) GOES-East spacecraft.
19 November 2014, 03:00 PM ET
The Philae lander is named for the Philae obelisk, as both are uncovering answers to ancient secrets.
19 November 2014, 02:00 PM ET
World-famous astrophysicist Stephen Hawking took to Facebook yesterday (Nov. 18) to share his views about a new film based on his life.
17 November 2014, 12:16 PM ET
The new biopic "The Theory of Everything" documents the personal life of cosmologist Stephen Hawking.
17 November 2014, 11:56 AM ET
The Leonid meteor shower of 2014 will peak on Monday and Tuesday (Nov. 17 and 18), but don't expect a dazzling celestial light show. Here's what to expect from the Leonids this year.
13 November 2014, 02:45 PM ET
The origins of organic matter found by Mars lander missions have long been debated, but a new study suggests a way to find out whether these chemicals of life came from the Red Planet or elsewhere.
12 November 2014, 01:14 PM ET
For the first time in history, a spacecraft built on Earth has softly landed on the face of a comet speeding through deep space.