Audio slideshow: Hubble's first 20 years

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.

Images courtesy Nasa. Music courtesy KPM Music.
Slideshow production by Paul Kerley. Publication date 23 April 2010.

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