23 September 2015, 02:29 PM ET
The most luminous galaxies in the universe likely formed slowly via gradual accretion of gas, rather than rapidly via mergers with other galaxies, new research suggests.
23 September 2015, 01:29 PM ET
Extremely luminous early galaxies – such as those simulated here in infrared light – established the structure of galactic clusters observed today by sub-millimeter wavelength telescopes.
23 September 2015, 01:01 PM ET
Observations by the European Space Agency's Rosetta spacecraft show that surface ice on Comet 67P/Churyumov-Gerasimenko, which Rosetta has been orbiting since August 2014, appears and disappears on a daily cycle tied to illumination by the sun.
23 September 2015, 09:41 AM ET
Future residents of the Moon’s Nearside will be treated to a 'fire-ringed' Earth during lunar eclipse totality (as Earth's shadow completely envelops the Moon, turning it "blood red").
23 September 2015, 07:15 AM ET
After spending more than two years in a weightless environment, whiskey distillate on the International Space Station tastes different from control samples on Earth, a whiskey company reported.
23 September 2015, 07:11 AM ET
The dark, fingerlike features that creep down steep Martian slopes in warm weather continue to puzzle scientists, and generate debate about the best ways to investigate the features.
23 September 2015, 07:00 AM ET
Omega Nebula, Swan Nebula, Checkmark Nebula, Horseshoe Nebula, Lobster Nebula — whatever you call it, the spectacular star-forming Messier 17 sparkles in a new photo.
23 September 2015, 06:00 AM ET
Swan, Omega, Horseshoe, Checkmark, Lobster and the names don't end there for Messier 17 (its proper astronomical designation). Located 5500 light-years from Earth in the Sagittarius constellation.
22 September 2015, 05:24 PM ET
This weekend's rare supermoon total lunar eclipse offers a mix of risk and scientific opportunity for NASA's Lunar Reconnaissance Orbiter, which has been studying Earth's nearest neighbor up close since 2009.
22 September 2015, 05:00 PM ET
Space.com's editors present a reading list for space and sci-fi lovers, as well as children who are interested in astronomy and spaceflight.
22 September 2015, 04:00 PM ET
A spectacular photo of Saturn's night side and its rings plus a glimmer of moon, from the Cassini spacecraft, shows just how dark the planet can get.
22 September 2015, 04:00 PM ET
See images of the ringed planet from NASA's Cassini spacecraft in orbit around Saturn.
22 September 2015, 12:47 PM ET
A new video called "To Scale: The Solar System" does its best to teach viewers just how vast our cosmic backyard really is, by creating a scale model of Earth's neighborhood in Nevada's Black Rock Desert.
22 September 2015, 08:00 AM ET
Here's a skywatching guide for the Sept. 27 "supermoon" total lunar eclipse — the first such event since 1982, and the last until 2033.
22 September 2015, 07:47 AM ET
Simulations suggest that Saturn's north polar hexagon is shaped by shallow jets at the cloud level. Winds below the cloud level apparently help keep the shape of the hexagon sharp and control the rate at which the hexagon drifts.
22 September 2015, 07:41 AM ET
On Thursday (Sept. 17), officials with NASA and the U.S. Agency For International Development (USAID) showcased the ways satellite data helps developing countries manage their resources and deal with natural disasters.
21 September 2015, 04:30 PM ET
The new Pluto animation stitches together images captured by NASA's New Horizons spacecraft during its historic flyby on July 14, which returned the first-ever up-close looks at the faraway dwarf planet.
21 September 2015, 09:43 AM ET
Actress Nichols recently rode a promotional flight on NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA), a modified Boeing 747SP aircraft equipped with a large infrared reflector telescope.
21 September 2015, 06:53 AM ET
With a week until the huge supermoon lunar eclipse, it's time to dust off your small telescopes and binoculars, track down an observatory event or webcast, or draft your invitations for a moon-cake party.
21 September 2015, 06:30 AM ET
Scientists are developing a mission concept that would send a probe flying through the plume created by the 100-odd geysers erupting from the south polar region of Saturn's ice-covered moon Enceladus.
20 September 2015, 04:37 PM ET
Jeff Bezos announced a new home for Blue Origin and NASA astronaut Scott Kelly reflected on having six more months in orbit. This is our roundup of the best space stories of the week, for Sept. 18, 2015.
18 September 2015, 11:06 PM ET
From a partial solar eclipse to a new view of Pluto, don't miss these amazing space images.
18 September 2015, 09:29 AM ET
A series of four total lunar eclipses in a row is called a tetrad, or four Blood Moons. See how lunar eclipse tetrads work in this Space.com infographic.
18 September 2015, 09:25 AM ET
Total solar eclipses are one of nature’s grandest events. What is a total solar eclipse? How do they work? And when is the next one? We explain.
18 September 2015, 09:00 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.
18 September 2015, 09:00 AM ET
Astronomers use many terms to describe what happens during an eclipse, and this glossary shows some of the more common things they say.
18 September 2015, 07:52 AM ET
Galaxies in the local universe show no signs of advanced alien civilizations — for now.
18 September 2015, 07:27 AM ET
Learn what makes a big full moon a true 'supermoon' in this SPACE.com infographic.
18 September 2015, 07:00 AM ET
NASA has been overly optimistic about its manned Red Planet plans in the past. But the agency's current goal of getting astronauts to Mars by the end of the 2030s is eminently achievable, NASA chief Charles Bolden said.
17 September 2015, 06:54 PM ET
Backlit by sunset over Pluto, NASA's New Horizon's probe captured rugged ~11,000ft (3,350m) mountains and wide glaciers of nitrogen ice. To quote Principal Investigator Alan Stern: "Pluto is surprisingly Earth-like...and no one predicted it."
17 September 2015, 05:14 PM ET
In a new video, an enormous cluster of sunspots rotates across the sun's face before gradually separating into several distinct groups, which also fired off a bunch of solar flares.
17 September 2015, 04:37 PM ET
The photo, which New Horizons took during its epic July 14 flyby of Pluto, captures a sunset view. Towering ice mountains cast long shadows, and more than a dozen layers of the dwarf planet's wispy atmosphere are clearly visible.