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18 May 2015, 01:34 PM ET
Three boulders balancing like ballerinas have been spotted on the surface of a comet by the Rosetta spacecraft. Only a small area on the surface of each rock is touching the ground, similar to "balancing rocks" seen on Earth.
18 May 2015, 09:00 AM ET
Smoke fills the cabin of a Star City Soyuz simulator and ESA astronaut Andreas Mogensen and Russian cosmonaut Sergei Volkov are forced to work through their contingency plans.
18 May 2015, 07:40 AM ET
A House appropriations subcommittee approved a spending bill May 14 that fully funds the Obama administration's overall request for NASA, but cuts commercial crew and space technology funds, adding it to planetary science and SLS.
18 May 2015, 07:00 AM ET
NASA and the European Space Agency are working together on a mission that would test out asteroid-deflection technologies. The Asteroid Impact and Deflection Assessment aims to slam a robotic probe into a space rock in 2022.
18 May 2015, 07:00 AM ET
Boeing has begun testing components of the CST-100 crew capsule's 'pusher abort system' at NASA's Langley Research Center in Virginia.
17 May 2015, 10:33 AM ET
A Russian cargo craft may have failed due to a problem with the rocket that launched it into space, and an astronaut explains how to "go" in space. Here are Space.com's top stories of the week.
17 May 2015, 09:17 AM ET
From the coast of Japan to a dragon selfie, don't miss these amazing space images of the week for May 17, 2015.
17 May 2015, 07:01 AM ET
The unmanned X-37B spacecraft is scheduled to launch Wednesday (May 20) at 10:45 a.m. EDT atop a United Launch Alliance Atlas V rocket from Florida's Cape Canaveral Air Force Station, kicking off the vehicle's fourth mission.
15 May 2015, 11:38 PM ET
On May 14th, 2015, exactly two months before the fly-by of Pluto is expected, mission scientists gathered at the American Museum of Natural History in NYC to speak to a crowd of school kids and museum patrons about the historic event.
15 May 2015, 04:23 PM ET
If you've been a fan of NASA's website for more than a decade, you can thank an unlikely space geek: actor Tom Cruise.
15 May 2015, 04:15 PM ET
By tracking the phases of six exoplanets, astronomers have tracked their daily weather cycles for the first time.
15 May 2015, 12:45 PM ET
The neutron star SGR 1745-2900 near the Milky Way's supermassive black hole Sagittarius A* is not slowing down its X-ray output as expected. Data from Chandra's X-ray Observatory show a slow decline in X-ray brightness and high temperature surfaces.
15 May 2015, 11:01 AM ET
Settling Mars could help humanity escape and mitigate the problems our species is facing here on Earth, several science-fiction authors said.
15 May 2015, 10:50 AM ET
The Hubble Space Telescope was used to study 3000 white dwarf stars in Milky Way star cluster 47 Tucanae. The white dwarfs are migrating outward from the center of the cluster, which is home to hundreds of thousands of stars.
15 May 2015, 10:30 AM ET
The House Science Committee approved four bills on commercial space topics during a lengthy markup session May 13 marked by partisan divides on a number of issues.
15 May 2015, 07:01 AM ET
The famous Big Dipper star pattern shines in May's night sky, as do the moon and a surprisingly nocturnal Venus.
15 May 2015, 07:00 AM ET
NASA's New Horizons probe, which is set to perform the first-ever flyby of Pluto on July 14, has begun hunting for possible rings and undiscovered moons, in an effort to identify potential hazards near the dwarf planet.
15 May 2015, 07:00 AM ET
"Elon Musk: Tesla, SpaceX, and the Quest for a Fantastic Future," by tech journalist Ashlee Vance, will be released on May 19. But you can get a sneak peak at the book now, via a lengthy excerpt published Thursday (May 14) on Bloomberg.com.
14 May 2015, 11:00 PM ET
As New Horizons nears its closest approach with Pluto, the mission team is hosting 'Pluto-Palooza' events in multiple locations around the country.
14 May 2015, 07:49 PM ET
NASA's Kepler mission captured over 2 months of Triton's orbit of Neptune. Small moon Nereid joins in on the dance on Day 24 and some streaking asteroids make the flurry complete.
14 May 2015, 04:24 PM ET
A giant nebula in the early universe hits the jackpot when it comes to rare, bright objects known as quasars, boasting four within surprisingly close proximity to one another. The first known quasar quartet lies in a cloud of cool gas that could provide a
14 May 2015, 03:17 PM ET
A preliminary investigation has revealed that the Progress 59 freighter's issues stemmed from a too-early separation of the Soyuz's third stage, officials with Roscosmos, Russia's federal space agency, announced Tuesday (May 12).
14 May 2015, 01:54 PM ET
A dense cloud of gas that astronomers are calling a 'cosmic dinosaur egg' appears to be on the cusp of birthing millions of stars. This may be the youngest example of an object called a globular cluster.
14 May 2015, 12:47 PM ET
See amazing images of the night sky and cosmos in SPACE.com's gallery of cosmic images posted in April 2015.
14 May 2015, 07:25 AM ET
A new video mashes up clips from "Star Wars" and "Star Trek" into an 85-second trailer for a fake 1985 film called "The Carbonite Maneuver," whose release would have been the sci-fi event of the century.
14 May 2015, 07:20 AM ET
NASA astronaut Scott Kelly says he's settling into his epic yearlong mission to the International Space Station, thanks in small part to the 'ISSPresso' coffee machine that arrived at the orbiting lab last month.
14 May 2015, 07:18 AM ET
"Chaotic planets" that possess wildly unpredictable orbits and climates likely circle distant stars, suggesting that some alien worlds that look habitable might actually be hostile to life for millions of years at a time, a new study reports.
14 May 2015, 07:00 AM ET
As dark matter circles around a black hole, it might create a gamma-ray signal that could be detectable from Earth. A visible signal from the otherwise-invisible stuff would be a major breakthrough in the study of this mysterious material.
13 May 2015, 10:33 PM ET
A clue to one of the biggest questions in cosmology — why did regular matter survive to fill the universe, instead of antimatter — may have been found in data from NASA's Fermi Gamma-ray Space Telescope.
13 May 2015, 05:01 PM ET
A new NASA image, captured by MODIS on the Aqua satellite, reveals clouds cover two-thirds of Earth, with some zones supporting more clouds than others on the planet.
13 May 2015, 04:45 PM ET
Mamtani took the image in Borrego Springs, California during the weekend of April 17, 2015.
13 May 2015, 04:09 PM ET
Bill Nye (The Science Guy) wants you to be a part — and get a part — of a "revolutionary solar sailing spacecraft." The leader of The Planetary Society has started crowdfunding for LightSail, a citizen-funded flight by light.