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

Researchers are 3D printing human muscle in zero gravity to create better disease models and improve astronaut health during space missions.

Does dark matter follow the same laws as ordinary matter? The mystery of this invisible and hypothetical component of our ...

On their way into space, astronauts' bodies deteriorate dramatically in zero gravity. To address this problem and protect our pioneers in space, researchers are looking for realistic test models. This ...

From dew at dawn to a foggy mirror after a shower, condensation is part of our daily lives on Earth. In space, microgravity ...

Chinese astronauts aboard Tiangong station witnessed a match flame transform into a blue sphere in microgravity. Unlike Earth ...

The ISS has “come into its own as a very sophisticated scientific laboratory,” says retired NASA astronaut Scott Kelly, who ...

Researchers have believed that Segue 1, a puny galaxy orbiting the Milky Way just 75,000 light-years away, was packed with dark matter, a substance in space that doesn't shine or interact with light.

Centuries before anyone pointed a telescope at the sky, Isaac Newton figured out how gravity works. He showed that any object with mass pulls on every other object—a result that explained falling ...

No, NASA didn’t confirm a second moon, but scientists did discover something else that’s been traveling with Earth for ...