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International Year of Astronomy - IYA2009
News Archives until 2010
Security & Defense
Missions and more
What is dark energy?
Exactly what is dark energy? Astrophysicists would also like to know the answer to this question – it determines how the Universe will develop. Cosmologists are fairly sure that it has been expanding since the Big Bang. What is still uncertain is whether this expansion will continue forever or whether the Universe will one day begin to collapse again.
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Last update: 21/10/2009 12:15:51