[permaculture] Pattern observation in astronomy | BBC News - New method 'confirms dark energy'

Lawrence F. London, Jr. venaurafarm at bellsouth.net
Sun May 22 10:14:23 EDT 2011


Pattern observation in astronomy |

BBC News - New method 'confirms dark energy'
http://www.bbc.co.uk/news/science-environment-13462926

"One type of observation used by the astronomers involves measuring a 
pattern in how galaxies are distributed in space. This pattern is known 
by the term "baryon acoustic oscillations".

The second type of observation involves measuring how quickly clusters 
of galaxies have formed over time. Both of these techniques confirmed 
the existence of dark energy and the acceleration in the expansion of 
the Universe.

The concept of dark energy was first invoked in the late 1990s by 
studying the brightness of distant supernovas - exploding stars.
Einstein was right

To explain why the expansion of the Universe was speeding up, 
astronomers had to either rewrite Albert Einstein's theory of gravity or 
accept that the cosmos was filled with a novel type of energy.

"The action of dark energy is as if you threw a ball up in the air, and 
it kept speeding upward into the sky faster and faster," said co-author 
Dr Chris Blake of the Swinburne University of Technology in Melbourne, 
Australia.

"The results tell us that dark energy is a cosmological constant, as 
Einstein proposed. If gravity were the culprit, then we wouldn't be 
seeing these constant effects of dark energy throughout time."


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