Deva Dasa
03 September 2010, 01:29 AM
"... those terrifiers of the world stood like two planets both deviating from their orbits." -- Sanjaya, Mahabharata, Book 8 (Karna Parva), Chapter 17, 8th century B.C.
http://cosmiclog.msnbc.msn.com/_news/2010/08/26/4974937-planets-spotted-in-changing-orbits
NASA's Kepler planet-hunting probe has spotted a system where two giant planets are locked in constantly changing orbits — with a super-Earth potentially pinned down in the crossfire.
Astronomers like to think of planets as a kind of celestial clockwork, keeping regular time. For example, the time it takes for the planets in our own solar system to complete their orbits can be calculated to within fractions of a second, and unless something huge happens, they'll stick to that timetable for billions of years.
In contrast, the two Saturn-size planets circling a sunlike star now known as Kepler-9, more than 2,000 light-years from Earth, shift their timetable with every go-round. Kepler-9b has an orbit lasting approximately 19.24 Earth days, while Kepler-9c has an orbit lasting a little more than twice as long, 38.91 days. But on average, Kepler-9b's orbit got about 4 minutes longer every time the Kepler astronomers checked, while Kepler-9c's averaged about 39 minutes shorter.
http://cosmiclog.msnbc.msn.com/_news/2010/08/26/4974937-planets-spotted-in-changing-orbits
NASA's Kepler planet-hunting probe has spotted a system where two giant planets are locked in constantly changing orbits — with a super-Earth potentially pinned down in the crossfire.
Astronomers like to think of planets as a kind of celestial clockwork, keeping regular time. For example, the time it takes for the planets in our own solar system to complete their orbits can be calculated to within fractions of a second, and unless something huge happens, they'll stick to that timetable for billions of years.
In contrast, the two Saturn-size planets circling a sunlike star now known as Kepler-9, more than 2,000 light-years from Earth, shift their timetable with every go-round. Kepler-9b has an orbit lasting approximately 19.24 Earth days, while Kepler-9c has an orbit lasting a little more than twice as long, 38.91 days. But on average, Kepler-9b's orbit got about 4 minutes longer every time the Kepler astronomers checked, while Kepler-9c's averaged about 39 minutes shorter.