“For the first time ever, humanity has changed the orbit of a planetary body,” said NASA planetary science division director Lori Glaze.
A change of 32 minutes in orbit — but only 4% of the total orbital period. To deflect an asteroid away from Earth, it’d better be done several years in advance. 🌏
Still, it can be done. An amazing first.
Technically, the two asteroids the DART is aiming at are a “binary” (they orbit each other).
The BBC’s explanation is pretty good.
They don’t even mention Bruce Willis until the final sentence.
And it comes from a travel mag. Talk about confidence!