As if satellites weren't enough, we now have a speeding ball of rock hurtling past the Earth tonight.
(The asteroid, romantically called Yu55, is about a quarter of a mile wide! It will pass inside the moon's orbit and come within 198,000 miles (319,000km) of Earth at 23.28GMT. Astronomers say this is the closest a tracked object this size has come to the planet, but it will pose no threat to the earth - this time. Seemingly, it's a regular visitor and there is a a one in 10m chance of its hitting Earth in the next century. Were it to strike, the collision would unleash the equivalent of several thousand megatonnes of TNT. Not to worry folks. We came in with a bang, but we'll probably go out with a whimper.)