Plus, there are asteroids that come close to the orbit of Earth, called Near-Earth asteroids. But now, for the first time, an asteroid has been discovered orbiting entirely inside Venus.

Launched in 1972, the failed Venus probe has been stuck in Earth orbit ever since. Now it's hurtling back down to Earth.

Kosmos 482 launched for Venus in 1972 but never left Earth orbit. The spacecraft finally lost enough energy that it couldn't fight gravity anymore.