Audio slideshow: The Hubble is 20

The world’s most famous space telescope has been peering into some of the deepest recesses of the universe for two decades – and is now celebrating its 20th birthday. In this Best of the BBC, you can take a look at some of the fantastic sights it has seen in that time with Professor Alec Boksenberg from the Institute of Astronomy in Cambridge – who was on the European team that helped build Hubble.

• Watch the BBC slideshow
• Hubble site