Enormous 'Trojan asteroid' following Earth is rare and 'almost a mile wide'

Earth is being followed by a huge “Trojan asteroid”, scientists have revealed.

It's one of the rarest asteroids ever discovered and shares the same orbit as our planet - and will track us for the next 4,000 years.

Researchers at the the Institute of Cosmos Sciences of the University of Barcelona confirmed the discovery of 2020 XL5, the second Earth Trojan asteroid ever found.