Good Lay Explanation on Dark Energy

In today’s Wasington Post there is a story about using gamma ray bursters to measure the expansion rate of the universe. The discovery that the universe was expanding at an acclerating rate was a major discovery in 1999. Since we do not what is pushing the universe apart physicists have taken to calling it “dark energy” where dark refers to unknown.
It has kept physicists, cosmologists, and astronomers very busy trying to find new theories to explain the effect and design new experiments to give us more data on the effect. The story is about one new measurement that has just been announced and I will have to do more study to find out if it is a useful new technique, but I was very impressed by the Wasington Post article’s explanation of the background to this new result. It was quite clear and correct.

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One Response to “Good Lay Explanation on Dark Energy”

  1. […] I have previously mentioned an article on a new measurment of dark energy. It was in the Washington Post so it obviously did not present many details. I finally had some time to dig around a little, and I found that the author, Bradley E. Schaefer, has been studying gamma ray bursts for several years and that he was a member of the Supernova Cosmology Project, which was one of the teams that first discovered dark energy. […]

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