It’s the year 2028, and we’ve been carefully monitoring a worrying situation: an enormous asteroid is en route to strike Earth, although the exact point of impact is not yet clear.

National governments are planning to evacuate millions of people, an undertaking that will cause untold human misery and disruption on a gigantic scale. If the asteroid’s impact zone can be fixed, perhaps such chaos can be avoided.

As precious hours pass, find out how our Planetary Defence Office is able to obtain crucial information on this potential disaster as part of the Agency’s Space Safety and Security activities.

Back to the present day: Find out more about how we are preparing to protect our pale blue dot, its inhabitants and the vital satellite systems on which we have become so dependent.

Space Safety & Security at ESA:

Planetary Defence: