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Star Birth Dominates Energy Production in Ultra-Luminous Galaxies

28 Nov 2009, 11:30 UTC
Star Birth Dominates Energy Production in Ultra-Luminous Galaxies
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In the early 1980’s, NASA’s Infrared Astronomical Satellite (IRAS) detected a number of unknown objects lurking in the depths of the cosmos.
At the time, these IRAS objects stirred speculation in the press. Were the infrared signals being emitted by comets inside the Solar System? Or were they failed stars (brown dwarfs) lurking beyond the orbit [...]Post from: Astroengine.comStar Birth Dominates Energy Production in Ultra-Luminous Galaxies

Artists impression of an ultra-luminous galaxy heating the surrounding dust (JAXA/ISAS/LIRA)
In the early 1980’s, NASA’s Infrared Astronomical Satellite (IRAS) detected a number of unknown objects lurking in the depths of the cosmos.
At the time, these IRAS objects stirred speculation in the press. Were the infrared signals being emitted by comets inside the Solar System? Or were they failed stars (brown dwarfs) lurking beyond the orbit of Pluto? The latter theory spawned the idea that the hunt for Planet X was back on (stoking the smoldering conspiracy embers of the flawed doomsday theory that Nibiru is coming to get us). Alas, it was neither, these intense infrared signals were coming from much, much further away.
It turned out that the infrared emissions were being generated by galaxies that, bizarrely, had little optical signal. ...

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