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If humans return to the Moon, they will need good maps. Luckily, one plucky little spacecraft has been making them. For the past seven years, the Lunar Reconnaissance Orbiter (LRO) has been painstakingly photographing almost all of the Moon’s surface. But the mission has not always gone to plan.

A meteor caused quite a stir near Chelyabinsk in central Russia last week. While countless tiny meteors fly across Earth’s sky every day, this particular ‘shooting star’ was much more spectacular – video footage of the event shows a fireball streaking across the sky before exploding.