Chinese scientists turn largest Earth surveillance network satellite upside down to hunt killer asteroid

Details have been revealed of a 2022 mission by a satellite so powerful it can see an ultra-dim target in space from 2 million km away. It has shed new light on China’s satellite capabilities, and may give the US more cause for concern over Beijing’s growing space power. — SCMP

A giant asteroid hurtles towards Earth on a path that could potentially end in disaster.

Known as 1994 PC1, it is as big as San Francisco’s Golden Gate Bridge, but as astronomers try to pinpoint its exact position, its distance of two million km – five times as far from Earth as the moon – poses a significant challenge.