[ExI] The lights are going out
pharos at gmail.com
Mon Aug 22 12:07:49 UTC 2011
Galaxies are running out of gas
A new study has shown why the lights are going out in the Universe.
August 22, 2011
The Universe forms fewer stars than it used to, and a CSIRO study has
now shown why - the galaxies are running out of gas.
"The drop-off in both gas availability and star formation seems to
have started around the time that Dark Energy took control of the
Universe," Dr Braun said.
Up until that time, gravity dominated the Universe, so the gas was
naturally pulled in to galaxies, but then the effect of Dark Energy
took over and the Universe started expanding faster and faster.
This accelerating expansion will have made it increasingly difficult
for galaxies to capture the additional gas they need to fuel future
generations of star formation, Dr Braun speculates.
So the far future looks dark.
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