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Fraser
2009-Nov-16, 10:00 PM
The exoplanet HAT-P-7b has been observed to have a very curious orbit. It either has a highly tilted orbit – passing almost over the poles of its parent star, HAT-P-7 -* or a retrograde orbit; that is, orbiting in the opposite direction of its parent star. Two teams of researchers, both using the Subaru Telescope [...]

More... (http://www.universetoday.com/2009/11/16/second-exoplanet-with-retrograde-orbit-discovered/)

jhwegener
2009-Nov-17, 08:13 AM
Perhaps such irregular orbits may give some clue to potential unstabilities in "average" planets systems? Then one may speculate what else such unstabilities may lead to. Perhaps "abandoned ("rogue") planets"?

timb
2009-Nov-17, 09:26 AM
The exoplanet HAT-P-7b has been observed to have a very curious orbit. It either has a highly tilted orbit passing almost over the poles of its parent star, HAT-P-7 -* or a retrograde orbit; that is, orbiting in the opposite direction of its parent star. Two teams of researchers, both using the Subaru Telescope [...]

More... (http://www.universetoday.com/2009/11/16/second-exoplanet-with-retrograde-orbit-discovered/)

HAT-P-7b is old Hat (http://www.bautforum.com/astronomy/58157-interesting-extrasolar-planet-discoveries-20.html#post1550983).