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.
Take a look at some of the 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.
http://news.bbc.co.uk/2/hi/science/nature/8638263.stm
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