The Hubble Space Telescope detected emissions emanating from the moon that are characteristic of the break up of water molecules. The Jupiter moon is thought to harbor a global ocean of water beneath its icy surface.
Daniella Saadeh and colleagues at the University College London have studied ancient cosmic light to find out if the universe looks the same in all directions.
NASA will hold a live teleconference on Monday, Sept. 26, to unveil what agency officials call "surprising activity" on Jupiter's moon Europa.
Last night (Sept. 25), SpaceX's Raptor interplanetary transport engine fired for the first time, according to a series of tweets from the company's CEO, Elon Musk.
Artifacts from some of the United States' first black astronauts have been included in the inaugural collection of the National Museum of African American History and Culture now open in Washington, D.C. Mae Jemison and Charles Bolden are represented.
In honor of the opening go the National Museum of African American History and Culture, NASA administrator Charles Bolden gives young people some advice on what to study to become an astronaut.
Liquid water is the only substance that explains observations so far.
The universe, it turns out, appears the same in every direction. A new study looking at the large-scale structure of the cosmos upheld a long-standing assumption and found no sign of directionality.
Elon Musk's space company aiming for first flight to the Red Planet in 2018 and the US space agency says the time is right.
The European Space Agency’s Rosetta spacecraft captured this view of Comet 67P on Sept. 20, just 10 days before its planned landing on the comet.
Singer-songwriter Grace Potter debuted an inspiring new space-themed music video highlighting the accomplishments of past, present and future women of NASA.
A 160-day-long simulated Red Planet mission began today (Sept. 24) at the Mars Desert Research Station (MDRS), a facility in the Utah desert operated by nonprofit group The Mars Society.
The famed astrophysicist has repeated his warning about humanity's potential first contact with intelligent aliens.
Investigators have traced the explosion that destroyed a SpaceX Falcon 9 on the pad Sept. 1 to a "large breach" in the helium system in the rocket’s second stage, although the root cause of the accident remains unknown.
See the best photos on Space.com this week.
China launched a new space lab, a new 3D map of more than a billion stars was released, and a gigantic meteorite was hauled out of the ground in Argentina. These are our picks for the best space stories of the week.
Three NASA astronauts who died in a fire on the launch pad may be honored with a new monument at Arlington National Cemetery in Virginia. The Apollo 1 Memorial Act seeks to recognize 50 years since the deaths of Gus Grissom, Ed White and Roger Chaffee.
A new simulation of how Pluto got its "heart" reveals that the dwarf planet most likely has a deep ocean beneath its surface.
North Korea's new rocket engine might help the country launch satellites to higher orbits, as the rogue nation claims — but the technology could also help North Korea's (possibly nuclear-armed) missiles fly farther, researchers say.
A senior U.S. State Department official said China and the United States plan to hold a second set of talks later this year to discuss how their militaries operate in space.