Gravity is what holds Earth in orbit around the sun and keeps us from floating off into space. Unfortunately, it can — quite ...

In a distant stretch of the universe, more than 10 billion light-years from Earth, astronomers have discovered something ...

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 ...

Because the Earth is doing the work of increasing the Moon's momentum, the Earth's rotation slows down in turn, as its momentum goes to the Moon. To put it another way, as the Moon's orbital momentum ...

Gravity is the unseen force that shapes the universe, yet we rarely give it much thought. First explained by Sir Isaac Newton, it is the pull that draws objects toward one another based on their mass ...

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 ...

Pulsars suggest that ultra–low-frequency gravitational waves are rippling through the cosmos. The signal seen by ...

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 ...