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NASA Finds the Sun is Not a Perfect Sphere Monday, October 06, 2008 - Anuradha Menon Home >> Headlines >> Space   
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Scientists using NASA’s RHESSI spacecraft have measured the roundness of the sun with unprecedented precision. They find that it is not a perfect sphere. During years of high solar activity the sun develops a thin 'cantaloupe skin' that significantly increases its apparent oblateness: the sun’s equatorial radius becomes slightly larger than its polar radius. Their results appear the Oct. 2nd edition of Science Express. 'The sun is the biggest and therefore smoothest object in the solar system.' (source: nasa.gov)
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