05 September 2014, 12:34 PM 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.
05 September 2014, 12:00 PM ET
Once every year or two, a comet appears in the sky that is bright enough to be seen with a small telescope or binoculars. Right now, observers anywhere in the Northern Hemisphere can see such a comet.
05 September 2014, 10:19 AM ET
Scientists want your help sorting through gorgeous images of Earth at night snapped by orbiting astronauts. Studying such photographs could show how light pollution is affecting human health and reveal ways to save energy and improve public safety.
05 September 2014, 09:44 AM ET
ESA's Rosetta spacecraft is carrying a bevy of internationally made instruments for imagery and spectroscopy of comet 67P/Churyumov-Gerasimenko. This animation highlights the wavelengths and fields of view the instruments can scan.
05 September 2014, 09:25 AM ET
A substance that was banned from use by the Montreal Protocol in 1987, carbon tetrachloride, still has a mysterious presence in the atmosphere. Levels of the substance has been declining, just not at the rate that was expected.
05 September 2014, 07:01 AM ET
Space travelers from around the world are headed for China this month for an international Planetary Congress to explore the possibilities of expanding human spaceflight cooperation among different countries.
05 September 2014, 06:50 AM ET
The Netherlands-based nonprofit Mars One, which aims to land four astronauts on the Red Planet in 2025, announced today (Sept. 4) that it's raffling off a round-trip suborbital flight aboard XCOR Aerospace's Lynx rocket plane.
05 September 2014, 06:40 AM ET
In December 2013, researchers using NASA's Hubble Space Telescope announced they had spotted evidence of geysers erupting from Europa's south polar region. But follow-up Hubble observations in January and February showed no signs of the plumes.
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, 04:18 PM ET
Shining almost directly overhead as darkness falls these days is the brilliant star Vega, in the constellation of Lyra, the Harp. Vega is the fifth-brightest star in the night sky and the third-brightest visible from midnorthern latitudes.
04 September 2014, 03:28 PM ET
NASA's Apollo 17 astronaut Jack Schmitt is having a few clumsy moments, struggling with his sample collection bag and falling down on the moon.
04 September 2014, 02:52 PM ET
Sequoia and Kings Canyon National Parks host some of the nation's biggest trees and tallest mountains. But the side-by-side parks in a remote corner of California also preserve some of the most dramatic views of the night sky.
04 September 2014, 02:26 PM ET
A YouTube search for "astronauts falling over" will yield dozens of results. New experiments might help explain why the Apollo astronauts occasionally struggled to stay upright.
04 September 2014, 02:15 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, 12:20 PM ET
See stunning photos of the night sky and sun as seen by stargazers around the world in this Space.com photo gallery for September 2014 made up of images sent in by Space.com readers.
04 September 2014, 12:06 PM ET
The 6.0-magnitude earthquake that rocked California's Napa Valley last month not only injured dozens of people and caused millions of dollars in damage, but it also warped the surface of Earth.
04 September 2014, 10:34 AM ET
The Global Precipitation Measurement mission's data ultimately ends up in the hands of scientists at the NASA's Goddard Space Flight Center in Greenbelt, Md. The long 'road' the data takes is explained.
04 September 2014, 07:17 AM ET
A bright moon of Saturn stands out against the dark background of the planet in a photo taken by a NASA probe studying the ringed wonder and its moons.
04 September 2014, 07:04 AM ET
A previously unknown asteroid spotted by a NASA telescope with a new lease on life is actually a comet, according to new observations.
04 September 2014, 07:00 AM ET
The northern lights are a stunning sight for people on Earth, but even astronauts can see the incredible light shows from outer space.
03 September 2014, 11:21 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.
03 September 2014, 08:48 PM ET
The space rock (named 2014 RC) was discover on August 31st, 2014 by the Catalina Sky Survey. Its closest approach, about 2:18pm EDT - September 7th, will be about one-tenth the distance from Earth to the Moon (~25,000 miles).
03 September 2014, 06:07 PM ET
The space tourism company and its partner automaker has just announced a chance for you and 3 of your friends to fly on SpaceShipTwo. Find out more about it at virgin.com.
03 September 2014, 02:44 PM ET
An intense M5.6-class solar flare erupted on August 24th, 2014 and NASA's SDO and STEREO spacecraft were on hand to observe it.
03 September 2014, 01:01 PM ET
A new cosmic map is giving scientists an unprecedented look at the boundaries for the giant supercluster that is home to Earth's own Milky Way galaxy and many others.
03 September 2014, 12:44 PM ET
A NASA satellite watched as a huge filament of plasma that had been creeping across the face of the sun erupted yesterday (Sept. 2).
03 September 2014, 11:50 AM ET
If you have any predictions about the state of space exploration a decade from now, NASA would like to hear them. The agency is soliciting messages for a 'time capsule' to fly aboard its Osiris-Rex asteroid mission.
03 September 2014, 09:30 AM ET
NASA's Solar Dynamics Observatory captured imagery of the filament that snaked across a huge area on the Sun. According to Spaceweather.com, "debris from the blast is hurtling in the general direction of Earth.
03 September 2014, 06:20 AM ET
China's space program has set its sights on an ambitious feat of lunar exploration: robotically landing a probe on the moon and returning lunar samples back to Earth.
03 September 2014, 06:01 AM ET
A dark, spider-shaped cloud of cosmic gas blocks out light from stars in a new image taken by a telescope in the Southern Hemisphere.
03 September 2014, 06:00 AM ET
The La Silla Observatory's MPG/ESO 2.2m telescope observed the Lupus 4 cloud, which lies 400 light years from Earth. This light-blocking cloud will one day give birth to stars. Full Story: http://goo.gl/4omk50
02 September 2014, 05:46 PM ET
The technology powering robotic arms in space could be used to perform minor surgeries for children on Earth.