Suni Williams, fresh off a nine-month space expedition, had a 2007 Boston Marathon performance that was simply out of this ...

Developed in 1915, general relativity suggests that gravity arises because bodies with mass cause the fabric of spacetime (the four-dimensional unification of space and time) to warp. The greater ...

But not gravity as we know it through the general theory of relativity, which says that space and time bend under the influence of matter and energy. Instead, he recasted Einstein’s famous ...

Just gravity. Breaking space news, the latest updates on rocket launches, skywatching events and more! To test this hypothesis, the team created an exceptionally simple simulated galaxy.

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

Two Mars gravity assists are expected, and NASA astronauts Suni Williams and Butch Wilmore are finally set to come home from an extended stay on the International Space Station. Here are five ...