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Artist rendering of new finds in the universe
Distant planets -Artist rendering illustrates newly discovered world (HAT-P-1) that has baffled astronomers, since planet is much larger than theory predicts, scientists said 9/14/06. HAT-P-1 has radius about 1.38 times Jupiter's but contains only half Jupiter's mass. (Reuters/David A Aguilar(CfA)/Handout)
A planet lighter than a ball of cork is one of the puffiest alien planets known to date. Called HAT-P-1, the planet is about half as massive as Jupiter but about 1.76 times wider-or 24 percent larger than predicted by theory. It could float in water, if there was a tub large enough to hold it.