Credit: David A. Aguilar (CfA)
The newly discovered world HAT-P-1 has baffled astronomers, since it is puffed up much larger than theory predicts. HAT-P-1 has a radius about 1.38 times Jupiter's but contains only half Jupiter's mass.
On the Net:
Harvard-Smithsonian Center for Astrophysics: http://www.cfa.harvard.edu/
Press Release
http://www.cfa.harvard.edu/press/pr0624.html
The newly discovered world HAT-P-1 has baffled astronomers, since it is puffed up much larger than theory predicts. HAT-P-1 has a radius about 1.38 times Jupiter's but contains only half Jupiter's mass.