Phobos: Facts About the Doomed Martian Moon
The moon's orbit brings it 6 feet closer to the red planet every century.
The moon's orbit brings it 6 feet closer to the red planet every century.
Deimos' radius is only 3.9 miles. The tiny moon zips around Mars in only 30 hours and is so close to its parent planet that it was missed for centuries.
Gravitational waves continue to make a splash among scientists in other fields.
Many publications note that at the time of the June solstice, for Northern Hemisphere localities, the days are longest and the nights are shortest. In the strictest sense, this is only half true — its more complicated when you factor in twilight.
A stunning photo of Saturn from the orbiting Cassini spacecraft reveals a large, bright smudge on the planet's outermost ring, suggesting interference from a passing object.
Cleaning up space junk is a high priority for space agencies who have to operate at orbits that can come dangerously to it. The company SKA Polska won an ESA contract to design a prototype gun to be tested on parabolic flights.
The green glow of a spring comet lights up this stunning image taken by astrophotographer John Chumack from John Bryan State Park Observatory in Yellow Springs, Ohio on April 12, 2016.
Microbes living in water deposits deep below the Arabian desert may provide clues about whether methane on Mars signals the presence of life.
A white, hot column of flame firing out of a rocket engine, backdropped by white clouds and a blue sky, looks like a work of art in this photo from the private company Firefly Space Systems.
Both the dwarf planet Ceres and Pluto's moon Charon may be covered with material similar to the graphite in a pencil.
A stunning new photo from NASA's Cassini spacecraft shows Saturn's dramatic profile, spotlighting how far it has tilted towards the sun since the craft arrived 12 years ago.
In June 2016, NASA's Solar TErrestrial RElations Observatory Ahead (STEREO-A) spacecraft captured imagery of the three planets and the Milky Way galaxy 'paints' the background.
The June full moon — sometimes called the "Strawberry Moon" — is luminous and colorful in these beautiful photographs from Space.com readers (and one astronaut).
The June full moon, sometimes known as a "Strawberry Moon" fell on the summer solstice in 2016. Readers from all over the world sent in photos of the gorgeous celestial sight.
As work on its giant aircraft nears completion, Stratolaunch Systems is still working to line up partners to provide launch vehicles to serve the growing small satellite market.
The Chinese government has agreed to help finance non-Chinese payloads and experiments to be operated from China’s future space station through the United Nations as part of its attempt to internationalize the program.
For the first time, cardiac and vascular structures were 3D printed in a microgravity environment using adult human stem cells. Three companies led by NASA contractor Techshot Inc. developed a "space hardened 3D bioprinter" prototype.