There are a lot of things in Earth's night sky, and every now and again, they line up in such a way to give us all a little bit of a giggle. On the nights of Thursday 24 and Friday 25 April, just such an alignment is going to take place,

Rise up bright and early for the celestial gathering of Mercury, Venus and Saturn alongside a crescent in the morning of April 25. This is a one-night event visible before dawn.