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

Scientists have known for a long time that the gravitational pull between the Earth and the moon have warped both bodies to look slightly egg-like in shape, but new data collected from NASA missions ...

It's been 286 days since astronauts Sonny Williams and Butch Wilmore have felt the pull of Earth's gravity. Gravity is really, really tough, tough, learning to live with it, but also without it. Our ...

Our universe would look so different, Kyle. You might not recognize it even if you could be here to see it. Unfortunately, there probably wouldn’t be a whole lot to see. I learned about this from ...

The gleaming moon hanging in our sky has been the subject of countless songs, poems, myths, and legends. But in reality, what would happen if the Earth suddenly lost the moon? Quite a few things, ...

Research shows Jupiter’s strong gravitational pull may have protected Earth by keeping its orbit steady and preventing it from drifting toward the Sun.

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

Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the discovery of Pluto in the 1930s. Labeled as planet X, prominent astronomers ...