European Space Agency Earth is getting closer to being able to defend against extraterrestrial threats. A spacecraft called Hera, set to launch Oct. 7, will travel to a binary asteroid system — in this case, one big rock, Didymos, orbited by another smaller rock, Dimorphos. In 2022, NASA sent another spacecraft, DART, to punch Dimorphos — the theory being that if an asteroid were to endanger Earth like the one that killed most dinosaurs 66 million years ago, we could defend Earth by knocking the rock off course. DART was a “triumph,” The New York Times noted, and the European Space Agency’s Hera will finish the experiment, taking deeper observations of the asteroid system. Together, DART and Hera will help create the first planetary defense protocol, just in case. |