Not because it is easy but because it is hard: this historic space phrase is pretty much the definition of ESA’s double-satellite Proba-3 mission, which will employ precise formation flying to produce artificial total solar eclipses in orbit, casting a shadow from one spacecraft to the other. No-one has ever flown a mission like this, up until now. So how is it going to work? Find out in this second trailer video.

Launch now scheduled for Thursday 5 December