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SPACE-ASTRONOMY-STARS
This combo released 04 October 2006 by the European Space Agency shows two images of one-half of the Hubble Space Telescope. A seam of stars at the centre of the Milky Way has shown astronomers that an entirely new class of planets closely orbiting distant suns is waiting to be explored, according to a paper published 04 October 2006. The green circles identify nine stars that are orbited by planets with periods of a few days. Planets so close to their stars with such short orbital periods are called "hot Jupiters." These are considered "candidate" exoplanets - planets that orbit stars other than our own - because most of them are too faint to allow for spectroscopic observations that would allow for a precise measure of the planet’s mass. The bottom frame identifies one of two stars in the field where astronomers were able to spectroscopically measure the star’s back-and-forth wobble due to the pull of the planet. The planet turns out to be less than 3.8 Jupiter masses. AFP PHOTO NASA/ESA/K. SAHU (STScI) AND THE SWEEPS SCIENCE TEAM
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Detalii fotografie |
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-, SPACE |
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AFP / Mediafax Foto |
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4 Octombrie 2006 |
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3000 x 3030 (2.63 MB) |
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