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Observations by the High-z Supernova Search Team
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Observations by the High-z Supernova Search Team

May 11, 2010
Observations by the High-z Supernova Search Team, described by Robert Kirshner, hint that we live in a "stop and go" universe whose expansion slowed under the influence of gravity before accelerating again due to an unexplained dark energy. This artist's conception illustrates the history of the cosmos, from the Big Bang and the recombination epoch that created the microwave background, to the formation of galactic superclusters and galaxies themselves. The dramatic flaring at right emphasizes that the universe's expansion currently is speeding up. (Year of image: 2003)


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