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Page last updated at 05:58 GMT, Tuesday, 21 April 2009 06:58 UK

'Still Sun' baffling astronomers

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Astronomers hope new images of the Sun will offer an insight into why there is so little activity on our closest star.

The BBC's Pallab Ghosh compares images of the Sun from 2001 and earlier this year to show how activity has fallen.

The footage was taken by the Hinode spacecraft, the Solar and Heliospheric Observatory and the Trace satellite.

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