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.
28 October 2014, 08:01 PM ET
An Orbital Sciences' Antares ORB3 rocket exploded during a launch attempt at NASA's Wallop Flight Facility on Oct. 28th, 2014. The spacecraft was carrying 5,000 lbs supplies, food and science experiments. Live Coverage: http://goo.gl/YhCmAu
28 October 2014, 07:15 PM ET
An unmanned Antares rocket built by the Virginia-based Orbital Sciences Corporation exploded in a massive fireball just after launch on Tuesday (Oct. 28), a shocking failure after an otherwise smooth launch countdown.
27 October 2014, 06:17 AM ET
The aurora borealis can make for a spectacular night sky show, even sometimes visible from space. Here are eight amazing facts about the northern lights.
24 October 2014, 06:31 PM ET
Gravitational waves, invisible ripples in the fabric of space and time, might be detected by looking for the brightening of stars, researchers say.
24 October 2014, 06:05 PM ET
In a harrowing plunge from the stratosphere, a Google executive broke the world record for the highest-altitude skydive today (Oct. 24).
24 October 2014, 04:15 PM ET
Stephen Hawking, the world-renowned astrophysicist and author of "A Brief History of Time," has recently joined Facebook.
24 October 2014, 03:38 PM ET
Alan Eustace dove from a high-altitude balloon soaring at approximately 135,000 feet. Felix Baumgartner held the record at 128,000 feet.
23 October 2014, 01:27 PM ET
The online Slooh Community Observatory will air a special three-hour solar eclipse webcast Thursday starting at 5 p.m. EDT (2100 GMT). You can watch the show at http://www.slooh.com, or here at Space.com, courtesy of Slooh.
20 October 2014, 02:38 PM ET
Spending long periods of time in space can be a psychologically demanding experience, but a new virtual reality system could give NASA astronauts a welcome escape.
20 October 2014, 09:29 AM ET
Warning: Do not look directly at the Sun. On October 23rd, 2014, most of the North America will be treated to the eclipse. Viewing from the eastern U.S. will be especially beautiful, weather permitting, due to it occurring at the end of the day.
20 October 2014, 02:43 AM ET
Comet Siding Spring came within just 87,000 miles of the Martian surface at 2:27 p.m. EDT today — about one-third of the distance between Earth and the moon. The comet barreled by at 126,000 mph relative to the Red Planet, NASA officials said.
18 October 2014, 09:18 PM ET
NASA scientist Dr. Michelle L Thaller tells Space.com's @MiriKramer what you need to know about comet Siding Spring's fly-by, its implications for the Red Planet and how humans will be able to observe it. Full Coverage: http://goo.gl/0cnCEb
17 October 2014, 05:05 PM ET
The top-secret nature of the X-37B missions has sparked a number of conspiracy theories. Here are some ideas about the X-37B's purpose.
17 October 2014, 11:06 AM ET
Comet Siding Spring will zoom within 87,000 miles of Mars at 2:27 p.m. EDT on Sunday (Oct. 19). Scientists will observe the flyby using the fleet of spacecraft already at Mars, studying the comet and any effects its dust has on the planet's atmosphere.
16 October 2014, 07:38 PM ET
A comet is on course for a super-close approach with the planet Mars this Sunday (Oct. 19) in a rare celestial encounter. If you have a moderate-size telescope, you might be able to spot the icy wanderer as it nears the Red Planet, weather permitting.
16 October 2014, 04:35 PM ET
Millions of people across North America will have a chance to observe a partial solar eclipse next week, weather permitting.
15 October 2014, 08:34 AM ET
A mysterious stone slab from the 12th century B.C. is a combination sundial and moondial, a new study finds. The slab would've helped ancient skywatchers track the movements of the sun and moon during heavenly events.
14 October 2014, 10:28 AM ET
Scientists previously thought that the moon's volcanic activity died down a billion years ago. But new data from NASA's Lunar Reconnaissance Orbiter, or LRO, hints that lunar lava flowed much more recently, perhaps less than 100 million years ago.
09 October 2014, 07:21 AM ET
The discovery of extraterrestrial beings — be they slimy microbes or little green men — would dramatically change the way we humans view our place in the universe. But would it shatter religion? Well, that depends on what you believe.
09 October 2014, 07:12 AM ET
Frigid lakes bombarded by UV radiation and boiling, acidic springs are some of the otherworldly Earth environments where scientists plan to hunt for clues to life on Mars.
08 October 2014, 11:25 AM ET
The moon turned an eerie blood-red hue during a total lunar eclipse early Wednesday (Oct. 8) in an epic skywatching treat for amateur astronomers. See the amazing photos and their impressions of the lunar event.
08 October 2014, 09:31 AM ET
The full moon darkens and grows reddish during a total lunar eclipse early today that dazzles observers around the world.