Photos and videos of astronauts on the ISS show them floating around, but saying there's zero gravity isn't fully accurate.

The younger black hole, the product of a cataclysmic cosmic event known as a black hole merger, was first spotted in 2019. Now, about 6 years later, a team of international researchers led by the ...

Einstein's theory of general relativity views time similarly to width, height, and length. As such, both time and space can be curved by gravity. This effectively means that time is slower the closer ...

A lot has happened in gravitational-wave astronomy over the past decade. Sept. 14, 2015, was one of the most important days in science history. It marked the first-ever detection of gravitational ...