Hubble at 25

Since its launch on 24 April 1990, the Hubble Space Telescope has taken over a million observations. To celebrate its 25th anniversary we give a run down of our 25 favourite Hubble images.

Taken for the telescopes 20th Anniversary, this image shows gas and dust rising to the top of a three lightyear tall pillar of cool hydrogen. Credit: NASA/ESA/M. Livio/Hubble 20th Anniversary Team (STScI)

The first few years of the telescope were extremely troubled.

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After of years of delays following the Challenger disaster, Hubble eventually made it to orbit only to discovered that there was an error in the mirror, blurring all its images.

Luckily the telescope was always designed to be upgradable.

The first servicing mission in 1993 fixed the misshapen mirror and the telescope was upgraded a further four times.

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The final mission to the telescope in 2009 fitted the telescope with new batteries and equipment that should keep the telescope running until 2020.