jan 252013
 
The Origin and Maintenance of a Retrograde Exoplanet

  Astronomers have used the Subaru Telescope to show that the HAT-P-7 planetary system, which is about 1040 light-years from Earth in the constellation of Cygnus, includes at least two giant planets and one companion star (Figure 1). The discovery of a previously unknown companion (HAT-P-7B) to the central star (HAT-P-7) as well as confirmation [continue reading]