Source: www.portaltotheuniverse.org --- Saturday, July 27, 2013
The Daily Galaxy: Two huge Jupiter-sized planets found in 2012 orbiting a star 375 light-years away that will soon transform into a red giant (image above), are among the oldest alien worlds yet discovered according to scientists at the Max-Planck Institute for Astronomy in Heidelberg, Germany. "The Milky Way itself was not completely formed yet," said Johny Setiawan. During a survey using radial velocity, in which astronomers watch for periodic wobbles in a star's light due to the gravitational tugs of orbiting worlds, Setiawan and colleagues found the signatures of the two planets orbiting the star, dubbed HIP 11952. At an estimated age of 12.8 billion years, the host star?and thus the planets?most likely formed at the dawn of the universe, less than a billion years after the big bang. Based on the team's calculations, one alien planet is almost as massive as Jupiter and completes an orbit in roughly seven days. The other exo planet is nearly three times Jupiter's mass and has an orbital period of nine and a half months. "Usually planets form just shortly after the star formation," Setiawan said. "Second-generation planets might also form after a star has died, but this is still under debate." The discovery indicates ... ...
Source: http://www.portaltotheuniverse.org/rview/276748/
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