NASA will launch the Double Asteroid Redirection Test this week

By Brad Tucker
Updated November 21 2021 - 8:16pm, first published November 20 2021 - 6:30pm
NASA will throw a DART at an asteroid later this week. Picture: NASA

Imagine a new asteroid, a kilometre in size, is detected. After a few measurements, astronomers determine its orbit will cross the path of Earth and has a high chance of colliding with Earth. What do we do?