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.
11 November 2014, 08:56 AM ET
A European probe is expected to make an audacious landing on the face of a comet tomorrow (Nov. 12), and you can follow it live online starting today (Nov. 11).
11 November 2014, 02:12 AM ET
SpaceIL is hoping to not only land an Israeli craft on the moon, but also learn a bit about lunar magnetism while the lander is there.
07 November 2014, 11:52 AM ET
The European Space Agency's Gaia mission, which launched in December 2013, should find about 21,000 alien planets over the course of its five-year mission and perhaps 70,000 distant worlds if it keeps operating for 10 years, the study found.
05 November 2014, 11:44 AM ET
The Taurid meteors, sometimes called the "Halloween fireballs," are typically at their best from Nov. 5 through Nov. 12. Unfortunately, a bright moon will dampen the display this year.
05 November 2014, 11:37 AM ET
Hundreds of witnesses saw three different fireballs streak above different locations in the US, but one of them might not have been a fireball at all.
03 November 2014, 06:04 PM ET
The biggest sunspot to grace the face of the sun in more than two decades is rotating out of view, but it was responsible for kicking up some truly amazing solar activity this week.
03 November 2014, 11:50 AM ET
A rare mineral known from just three massive meteorite impacts has now turned up in a Wisconsin crater.
03 November 2014, 09:52 AM ET
31 October 2014, 04:23 PM ET
SpaceShipTwo, Virgin Galactic's passenger spacecraft, experienced an 'anomaly' during its fourth rocket-powered test flight on Friday, Oct. 31. See the latest details here.
31 October 2014, 01:55 PM ET
The Earth will never catch up to the moon (let's hope), but the number of Ordovician craters may soon takeoff. That's because it's easier and cheaper than ever to sniff out the shocked minerals that confirm an impact.
30 October 2014, 06:33 PM ET
Scientists have found evidence of water in our inner solar system 135 million years earlier than previously thought.