Hidden planet discovered in old Hubble data
- URL to an interesting article in Fox news
First few paragraphs
A new technique has uncovered an extrasolar planet hidden in Hubble Space
Telescope images taken 11 years ago.
The new strategy may allow researchers to uncover other distant alien worlds
potentially lurking in over a decade's worth of Hubble archival data.
The method was used to find an exoplanet that went undetected in _Hubble
images_ (http://www.space.com/bestimg/index.php?cat=hst) taken in 1998 with its
Near Infrared Camera and Multi-Object Spectrometer (NICMOS).
Astronomers knew of the planet's existence from images taken with the Keck
and Gemini North telescopes in 2007 and 2008, long after Hubble snapped its
first picture of the system.
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The planet is estimated to be at least seven times the mass of Jupiter. It
is the outermost of three massive planets known to orbit the dusty young star
HR 8799, which is 130 light-years away from Earth.
NICMOS could not see the other two planets because its coronagraphic spot —
a device that blots out the glare of the star —blocked its viewof the two
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