When teachers explain ocean tides, they frequently describe how the moon's gravity pulls on Earth and all of its water. This, they often say, leads to a gravitational imbalance, which stretches the ...

Scientists say microscopic wormholes could explain discrepancies in cosmological constants and affect our understanding of ...

You may have heard people say that aboard the International Space Station (ISS) there's "zero gravity," but in fact, gravity is still very much present. The station orbits Earth at an altitude of ...

Learn what a black hole is, how it forms, and how astronomers detect it. Understand the science behind black holes and their ...

Astronomers have long described black holes as cosmic traps so powerful that nothing — not even a beam of light — can claw ...

Quantizing gravity — and for the faint of heart, don't worry, we'll define what that means soon enough — can't be that hard, could it? I mean, we've got the other forces —electromagnetism, strong ...