NASA Kepler Telescope Finds Another 52 Alien Planets In Habitable Zone
Kepler-SETI Hesitantly Admits They Detected Alien Signals
US Military Pays SETI To Check Kepler-22b For Aliens
NASA Kepler Discovered The Most Habitable Planet Since Earth
Kepler: NASA Announce Discovery Of Two Earth-Sized Alien Planets
NASA - Kepler Discovers Star War Like Planet, Orbiting Binary Stars
NASA Kepler Spacecraft Found Two New Earth Size Planet
Five Earth Like Planet Found Circling Alien Sun HD 10180
UFO seen near the launch of NASA Kepler Telescope
In latest development, a research team led by astronomers at the University of Washington and Harvard University has discovered a bigger version of Earth locked in an orbital tug-of-war with a much larger, Neptune-sized planet as they orbit very close to each other around the same star about 1,200 light years from Earth.
The planets occupy nearly the same orbital plane and on their closest approach come within about 1.2 million miles of each other – just five times the Earth-moon distance and about 20 times closer to one another than any two planets in our solar system.
But the timing of their orbits means they'll never collide, said Eric Agol, a UW astronomy professor and co-lead author of a paper documenting the discovery published June 21 by Science Express, the online edition of the journal Science. "These are the closest two planets to one another that have ever been found," Agol said. "The bigger planet is pushing the smaller planet around more, so the smaller planet is harder to find."
Orbiting a star in the Cygnus constellation referred to as Kepler-36a, the planets are designated Kepler-36b and Kepler-36c. Planet b is a rocky planet like Earth, though 4.5 times more massive and with a radius 1.5 times greater. Kepler-36c, which could be either gaseous like Jupiter or watery, is 8.1 times more massive than Earth and has a radius 3.7 times greater.
The larger planet was originally spotted in data from NASA's Kepler satellite, which uses an instrument called a photometer to measure light from distant celestial objects and can detect a planet when it transits, or passes in front of, and briefly reduces the light coming from, its parent star.
Source : http://www.dailygalaxy.com/my_weblog/2012/06/outsized-version-of-earth-discovered-by-kepler-planet-sleuths.html