ASTROBIOLOGY PLANETS & MOONS A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site OGLE-2005-BLG-390Lb Artist's illustration of an icy/rocky planet orbiting a dim star. Credit: NASA, ESA and G. Bacon (STScI) The most Earth-like extrasolar planet discovered to date, in terms of its mass and distance from its parent star. OGLE-2005-BLG-390Lb has just five times the Earth's mass. It orbits a red dwarf star some 25,000 light-years away. OGLE-2005-BLG-390Lb was found by the technique of microlensing. Its discovery involved a collaboration of three microlensing campaigns, PLANET/RoboNet, OGLE, and MOA, and researchers from 12 countries. OGLE-2005-BLG-390Lb is almost certainly a terrestrial-type planet, made mostly of rock with a metallic core, like the Earth. However, its large orbit and cool parent star must make it a very frigid place; its estimated surface temperature is -220°C (-364°F). OGLE-2005-BLG-390Lb takes about 10 years to go around its orbit, which is roughly three times bigger than Earth's orbit around the Sun. Related categories    • PLANETS AND MOONS    • ASTROBIOLOGY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP