The newly discovered world HAT-P-1 (shown here in an artist's rendering) 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. Credit: David A. Aguilar (CfA) High Resolution Image (jpg) Low Resolution Image (jpg)
The newly discovered world HAT-P-1 (shown here in an artist's rendering) 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.Credit: David A. Aguilar (CfA) High Resolution Image (jpg) Low Resolution Image (jpg)