There's an astronomical number of asteroids hanging around Earth, and it's important to spot them before they get too close. Here's one way NASA achieved that.
NASA plans to launch many more spacecraft to study celestial bodies, but first it has to make sure they can handle space. That's where this simulator comes in.
Everything worth knowing about Lucy, NASA's long-distance asteroid probe: the mission, the mistakes, and how it could discover the origin of the solar system.