13 October 2014, 05:20 PM ET
Rosetta team members have named the 82-foot-tall boulder on Comet 67P/Churyumov-Gerasimenko "Cheops," after the largest pyramid in Egypt's famous Giza complex.
13 October 2014, 04:54 PM ET
A recently discovered planet-like star may offer insight into which of the thousands of planets so far discovered in the universe could support life.
13 October 2014, 07:00 AM ET
Comet Siding Spring, also known as C/2013 A1, will miss the Red Planet by just 87,000 miles (140,000 kilometers) at 2:27 p.m. EDT (1827 GMT) Sunday. For comparison, the moon orbits Earth at an average distance of 239,000 miles (384,600 km).
13 October 2014, 12:38 AM ET
NASA's Hubble Space Telescope has spotted a few objects that the New Horizons probe might be able to explore after it zooms past the Pluto system during a highly anticipated flyby on July 14, 2015.
12 October 2014, 10:53 PM ET
Launched by the Soviet Union in 1957, Sputnik 1 became the world’s first artificial satellite. This legacy continues today with our exploration of the solar system.
10 October 2014, 11:47 AM ET
Forget Saturn's rings. The jewel of the solar system has another stunning feature that only faraway spacecraft can see clearly: a hexagon-shaped vortex that's been swirling above Saturn's north pole for at least 30 years.
10 October 2014, 11:45 AM ET
An excerpt from Marc Kaufman's 'Mars Up Close: Inside the Curiosity Mission,' which was published in August 2014 by National Geographic.
10 October 2014, 10:06 AM ET
Australian astronomers have 'weighed' dark matter associated with the Milky Way, with a surprising result. There is half as much as previously thought, easing the fit between theory and observation.
09 October 2014, 05:06 PM ET
NASA's fleet of Red Planet orbiters and rovers will be watching on Oct. 19, when Comet Siding Spring zooms within 87,000 miles of Mars.
09 October 2014, 02:15 PM ET
A strange exoplanet 260 light-years from Earth is showing signs of water vapor in its atmosphere, despite scorching temperatures that are hot enough to melt steel, scientists say.
09 October 2014, 02:01 PM ET
A densely packed star-forming galaxy is reproducing the events that brought light to the early universe.
09 October 2014, 02:01 PM ET
Many "warm Jupiter" alien worlds were probably pulled into their puzzling orbits by nearby planetary neighbors circling on a different plane. The results suggest that not all planetary systems are "flat" like our own solar system, researchers said.
09 October 2014, 11:00 AM ET
Lunar eclipses occur when Earth's shadow blocks the sun. There are three types: The most dramatic is a total lunar eclipse. Find out when is the next one.
09 October 2014, 07:00 AM ET
Space agency scientists are developing two separate mission concepts, called Lunar Flashlight and the Resource Prospector Mission, to assess, and learn how to exploit, stores of water ice and other lunar resources. Both would launch by 2018.
09 October 2014, 07:00 AM ET
After a 40-year search, astronomers have apparently found the first Thorne-Zytkow object, a hypothesized hybrid star thought to form when a red supergiant swallows a neutron star.
09 October 2014, 12:13 AM ET
Each of the colorful objects in this space wallpaper illustrates one of 30 merging galaxies. The contours in the individual galaxies show the signal strength from carbon monoxide while the color represents the motion of gas.
08 October 2014, 05:30 PM ET
The building phase of the $1.4 billion Thirty Meter Telescope kicked off today with a groundbreaking/dedication ceremony near the top of Hawaii's Mauna Kea. If all goes according to plan, TMT should begin observing the heavens in 2022.
08 October 2014, 01:45 PM ET
The heart of at least one extremely bright X-ray source is a pulsing star rather than a black hole, a find that startled scientists.
08 October 2014, 01:44 PM ET
A black hole that is eating a star faster than scientists had ever thought possible is unleashing unusually bright X-ray signals that may help scientists understand a group of weird, superbright objects in deep space.
08 October 2014, 01:13 PM ET
The gravity of a 'pulsing' neutron star pulls in material from surrounding accretion disk. In this animation, the material is drawn into 2 spots above and below the core and is superheated releasing x-rays.
08 October 2014, 10:50 AM ET
A California energy company is using laser technology originally developed to search for methane on Mars to pinpoint natural gas leaks here on Earth.
08 October 2014, 09:48 AM ET
The sinuous feature, which was imaged on Sept. 30 by NASA's Solar Dynamics Observatory (SDO), extends for about 1 million miles (1.6 million kilometers) — about 100 times the width of Earth, agency officials said.
08 October 2014, 09:00 AM ET
An analysis of rocks brought back to Earth by NASA's Apollo missions suggests that most of the water trapped in rocks on the moon's surface originated from streams of solar particles rather than comet impacts.
07 October 2014, 04:34 PM ET
Edward C. Stone, now Thirty Meter Telescope Board's Vice-Chair, explains the technical specifications of the telescope and the science it will produce. Groundbreaking for the telescope occurred near the summit on Mauna Kea, Hawaii on Oct. 7th, 2014.
07 October 2014, 04:21 PM ET
With its adaptive optics and much larger aperture, the ‘TMT’ will deliver finer detail than the Hubble Space Telescope. Groundbreaking for the telescope occurred near the summit on Mauna Kea, Hawaii on October 7th, 2014.
07 October 2014, 01:23 PM ET
Record lows in sea ice have been recently recorded in the Arctic but ice around the opposite pole of the planet is on the rise. This is probably not due to climate stabilization:
07 October 2014, 08:00 AM ET
A lunar eclipse will take place on Oct. 8, 2014. See how to see it with the sky maps in this Space.com gallery.
07 October 2014, 07:00 AM ET
Huge galaxies have to eat their neighbors to keep growing, a new study reveals. A survey of 22,000 galaxies showed that the largest among them are nowhere near as good at creating stars as smaller ones. Instead, the massive galaxies snack on dwarf galaxie
07 October 2014, 12:13 AM ET
See images of the planned Thirty Meter Telescope, a giant observatory to peer deep into the universe from a mountaintop in Hawaii.
06 October 2014, 06:38 PM ET
NASA's Solar Dynamics Observatory captured the filament snaking across the surface for several days. Imagery from September 30th, 2014 to October 5th (when the it rotated out of view) have been compiled in this time-lapse.
06 October 2014, 07:00 AM ET
The Milky Way may be home to some 3,000 extraterrestrial civilizations but the vast distances between our galactic cousins will make contact extremely rare, a new study concludes.
05 October 2014, 12:26 PM ET
What was your favorite space news story of the last week?