Satellite images taken more than three decades apart show the disappearance of Iceland's Okjökull, the first glacier to be ...

The NASA astronauts splashed down on Tuesday in a SpaceX capsule after problems with a Boeing vehicle set in motion a ...

Less than one per cent of Australia's SKA-Low telescope is complete – but its first image reveals a sky dotted with ...

Spring gets its official start Thursday in the Northern Hemisphere with the arrival of the vernal equinox. But what does that ...

Firefly's Blue Ghost witnessed Earth blocking out the Sun from its point of view on the Moon, while we experienced a lunar ...

It's rare for any observatory to directly image a planet beyond our solar system, called an exoplanet, but the powerful James ...

For an hour, HERA flew as close as 5,600 kilometers from the Martian surface, at a speed of 33,480 kilometers an hour. It ...

The pair waved and smiled as they emerged from the SpaceX Dragon, which splashed down off the coast of Florida.

Since those early steps, extravehicular activity has helped provide the solutions to many problems that astronauts face in ...

Former astronaut Chris Hadfield has explained what the readjustment period will be like for Barry Wilmore and Sunita Williams ...

Astronomers have confirmed the existence of four planets orbiting a star less than 6 light-years away with help from some of ...

Researchers have broken a distance record in quantum communication by sending a secret encryption key nearly 13,000 km from ...