Walter Watts
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virus: Astronomers Discover Planet in Orion
« on: 2004-07-10 16:09:46 » |
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Astronomers Discover Planet in Orion
Jul 9, 3:28 PM (ET)
DALLAS (AP) - Astronomers have discovered a planet orbiting a star in
the constellation Orion - without ever actually seeing it. They watched
the star, about 140 light-years or roughly 800 trillion miles away, and
deduced the presence of a planet by how much the star wiggled.
The planet, called HD 37605b, is a gas giant at least 2.8 times the mass
of Jupiter. HD 37605b zips around its star - HD 37605, near the bright
star Betelgeuse - once every 54 days.
It is 123rd planet known beyond the solar system.
The astronomers made the discovery, reported in Thursday's online
edition of The Dallas Morning News, using the Hobby-Eberly Telescope.
"This will be the first of many planets coming out of the HET," said
William Cochran, an astronomer at the University of Texas at Austin and
leader of the research team.
The telescope uses 91 mirrors, each in the shape of a hexagon, to gather
light across a surface 30 feet across.
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