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Astronomy Picture of the Day
WMAP Resolves the Universe
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#80159
by
[z]Barbara Harris
@
26.09.2005 00:00
- nach oben -
WMAP Resolves the Universe
Explanation: Analyses of a new high-resolution map of
microwave light
emitted only 380,000 years after the
Big Bang
appear to define
our universe
more precisely than ever before. The eagerly awaited results announced last year from the orbiting
Wilkinson
Microwave Anisotropy Probe
resolve several
long-standing disagreements
in
cosmology
rooted in less precise data. Specifically,
present analyses
of
above WMAP all-sky image
indicate that the universe is 13.7 billion years old (accurate to 1 percent), composed of 73 percent
dark energy
, 23 percent
cold
dark matter
, and only 4 percent
atoms
, is currently
expanding
at the rate of 71 km/sec/
Mpc
(accurate to 5 percent), underwent episodes of rapid expansion called
inflation
, and will
expand forever
. Astronomers will likely research the
foundations
and
implications
of
these results
for years to come.
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