Reaction wheels are useful things, typically used by satellites to keep themselves oriented the right way up in space. Turning the reaction wheel creates an equal and opposite torque in the spacecraft ...

Four years ago, NASA purposely smashed a spacecraft into a small asteroid to see if they could deflect it—a test to prove humanity could protect Earth from threatening space rocks.

Asteroids with tiny moons may be quietly trading material across space. Images from NASA’s DART mission revealed faint ...

Studying the 2022 collision's effects can help scientists protect the Earth from celestial objects that might head toward us ...