Our Solar System is filled with ancient and fast-moving space rocks – we know of well more than 600 000 asteroids! Of these, around 20 000 have an orbit that crosses the Earth’s orbit. They come with a plethora of possibilities for something to go wrong. So shall we be worried? We will find out from none other than Paolo Martino—the Principal Engineer of Hera, ESA’s first Planetary Defense mission.
