Content of the Universe
Warning! This graph will continue to change slightly as better and better data is collected This image is made with 3 year WMAP data. The final 9 year data produces a more accurate result.
WMAP Three year data reveals that its contents include an estimate of 4% atoms, the building blocks of stars and planets. Dark
matter comprises 22% of the universe. This matter, different from atoms, does not emit or absorb light.
It has only been detected indirectly by its gravity. 74% of the universe, is composed of "dark
energy", that acts as a sort of an anti-gravity. This energy, distinct from dark matter, is
responsible for the present-day acceleration of the universal expansion.
5 year data reveals a somewhat more exact answer.
Credit: NASA / WMAP Science Team
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WMAP # 060916