View Full Version : New Class of Planets Found

2005-Sep-07, 10:03 PM
SUMMARY: Astronomers announced today that they have discovered a new class of extrasolar planets which are between 10 and 20 times the mass of the Earth - roughly the same size as Neptune. Two planets were discovered orbiting smaller stars: one around Gliese 436 and another around 55 Cancri. Both planets orbit their parent stars in about 3 days. They were discovered using the radial velocity method, which finds planets because of how they wobble their parent star. Because these planets are much smaller than Jupiter, they're probably made of rock and ice, rather than gas.

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