NASA Spacecraft Finds the Sun is Not a Perfect Sphere

(PhysOrg.com) -- 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.

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