24 September 2014, 10:48 PM ET
A Neptune-sized planet beyond the solar system has telltale traces of water vapor in its atmosphere, making it the smallest known wet exoplanet yet, scientists say. The exoplanet HAT P-11b is about four times the size of Earth and about 124 light-years aw
24 September 2014, 02:33 PM ET
Observations of planet HAT-P-11b by the Hubble, Spitzer and Kepler Space Telescopes were used to make the discovery. The planet is 120 light-years away in the constellation of Cygnus.
Full Story: http://goo.gl/8h7zEP
23 September 2014, 05:55 PM ET
Supposed evidence of gravitational waves from the dawn of time may actually be the signature of dust and gas in our own Milky Way galaxy, a new study reports.
22 September 2014, 10:38 AM ET
After a 10-month journey through deep space, NASA's MAVEN probe arrived in Mars orbit late Sunday, on a mission to help determine why the Red Planet changed from a warm and wet place in the ancient past to the cold, arid world it is today.
19 September 2014, 02:04 PM ET
The AMS particle detector aboard the International Space Station has found more evidence of dark matter in cosmic ray data.
19 September 2014, 11:22 AM ET
Dragon will lift off atop SpaceX's Falcon 9 v1.1 rocket at 2:16 a.m. EDT Saturday from Florida. Dragon will fly nearly parallel to the U.S. East Coast, so the launch should be visible in varying degrees along much of the Eastern Seaboard.
17 September 2014, 02:00 AM ET
Astronomical clues could pinpoint the day Claude Monet painted "Impression, Soleil Levant (Impression, Sunrise)," the piece that lent its name to the Impressionist art movement.
16 September 2014, 02:25 PM ET
In the 1998 movie 'Armageddon,' an asteroid the size of Texas threatens to collide with Earth in 18 days. Despite its entertainment value, the film is fantastically inaccurate, astronomer Phil Plait said.
15 September 2014, 05:45 PM ET
A new project aims to send a special message from Earth — a type of global "selfie" — into space, by uploading it to a spacecraft traveling through the cosmos on its way to Pluto.
13 September 2014, 02:30 PM ET
The solar storms currently affecting Earth have created stunning northern lights displays for skywatchers.
13 September 2014, 01:18 PM ET
Researchers from NASA and Washington University will launch a telescope called X-Calibur to measure X-rays from black holes.
12 September 2014, 07:03 AM ET
Two powerful solar storms arriving at Earth today have captured the public's attention for their potential to spark amazing auroras, but scientists say there's another reason to watch. The solar one-two punch is actually somewhat rare.
12 September 2014, 12:54 AM ET
Powerful solar flares from the sun this week may amplify the northern lights displays over parts of the northern United States through the weekend, space weather scientists say.
11 September 2014, 07:10 PM ET
NASA's Solar Dynamics Observatory (SDO) and Solar and Heliospheric Observatory (SOHO) captured September 10th, 2014's X1.6-class flare and ensuing coronal mass ejection (CME).
11 September 2014, 06:04 PM ET
NASA's Interface Region Imaging Spectrograph (IRIS) mission can only study small areas of the Sun's surface at a time. This week’s mission planner pointed the probe at promising sunspot AR2158 just in time for an X1.6-class flare.
11 September 2014, 06:02 PM ET
The sun launched back-to-back solar flares directly at Earth this week, but the geomagnetic storms pose little danger, officials said.
11 September 2014, 06:01 PM ET
Sunspot AR2158 produced a X1.6-class flare on September 10th, 2014. The site of the blast faced where Earth would be if a coronal mass ejection (CME) was emitted. Imagery not yet fully returned from orbiting observatories will be checked for this.
11 September 2014, 05:10 PM ET
Solar flares are powerful blasts of radiation unleashed by the sun. When aimed directly at Earth, these eruptions can trigger geomagnetic storms and knock out power grids and communications. Here are some spectacular photos of solar flares.
11 September 2014, 12:31 PM ET
The sun fired off strong flares Tuesday and Wednesday from a sunspot known as Active Region 2158, which will be the focus of a free webcast hosted today at 1 p.m. EDT by the online Slooh Community Observatory. Watch it here on Space.com.
09 September 2014, 12:39 PM ET
After a dramatic growth spurt this week, a wildfire burning in California's Yosemite National Park forced hikers to evacuate and produced a billowing veil of smoke that can be seen from space.
09 September 2014, 12:02 PM ET
Mars rovers built by students from around the world took part in the European Rover Challenge, a competition to build robots that could aid humans on a future manned mission to the Red Planet.
09 September 2014, 01:55 AM ET
A committee formed by the Nicaraguan government determined that a new, 39-foot-wide (12 meters) crater found near capital city Managua's international airport was blasted out by a space rock strike Saturday night. But experts aren't convinced.
08 September 2014, 06:42 PM ET
This past weekend, students from around the world faced off in a competition to test mock Mars rovers designed to explore the surface of the Red Planet.
08 September 2014, 03:37 PM ET
Are you ready to capture the "supermoon" tonight? This evening, the moon will be at its best — in its full phase and at its closest point to Earth. If you have got a camera ready, it's a prime opportunity to capture a brilliant lunar spectacle.
08 September 2014, 02:17 PM ET
The full Harvest Moon rises tonight (Sept. 8), and even if you can't see it from your own backyard, you can still watch it live online.
08 September 2014, 01:53 PM ET
Big slabs of ice are sliding over and under each other within Europa's ice shell, a new study suggests. The Jovian satellite may thus be the only solar system body besides Earth to possess an active system of plate tectonics.
07 September 2014, 09:16 AM ET
Two new lava-spouting fissures opened overnight in Iceland, and NASA’s Terra satellite spied the hotspots from space.
05 September 2014, 07:50 AM ET
Robots built by students from around the world will face off in a competition designed to test how well these wheeled explorers might one day get around on the surface of Mars.
04 September 2014, 09:34 PM ET
This stunning space wallpaper shows a striking pair of wildly misaligned planet-forming gas discs around both the young stars in the binary system HK Tauri.
04 September 2014, 07:16 PM ET
An asteroid will make a close brush with Earth on Sunday, passing by the planet well inside the orbit of the moon.
04 September 2014, 06:54 PM ET
Satellites finally caught a view of Iceland's spectacular eruption from space.
03 September 2014, 11:55 PM ET
In this amazing space wallpaper from the Wide Field Imager on the MPG/ESO 2.2-metre telescope at ESO’s La Silla Observatory in Chile young stars huddle together against a backdrop of clouds of glowing gas and lanes of dust.