Dark Energy Dr. Fred Raab. 2 Three types of measurements… Relic Light from Big Bang Imaged by WMAP...
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Transcript of Dark Energy Dr. Fred Raab. 2 Three types of measurements… Relic Light from Big Bang Imaged by WMAP...
![Page 1: Dark Energy Dr. Fred Raab. 2 Three types of measurements… Relic Light from Big Bang Imaged by WMAP satellite showing structure of infant universe 13,000,000,000.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d2c5503460f94a01854/html5/thumbnails/1.jpg)
Dark Energy
Dr. Fred Raab
![Page 2: Dark Energy Dr. Fred Raab. 2 Three types of measurements… Relic Light from Big Bang Imaged by WMAP satellite showing structure of infant universe 13,000,000,000.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d2c5503460f94a01854/html5/thumbnails/2.jpg)
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Three types of measurements…
Relic Light from Big Bang Imaged by WMAP satellite
showing structure of infant universe
13,000,000,000 years ago Sloan Digital Sky
Survey of one million galaxies showing walls and voids of
universe over billions of light years
Supernova distance/brightness measurements extending out to billions of light years
![Page 3: Dark Energy Dr. Fred Raab. 2 Three types of measurements… Relic Light from Big Bang Imaged by WMAP satellite showing structure of infant universe 13,000,000,000.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d2c5503460f94a01854/html5/thumbnails/3.jpg)
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The big surprise: thinking before and after 1998
![Page 4: Dark Energy Dr. Fred Raab. 2 Three types of measurements… Relic Light from Big Bang Imaged by WMAP satellite showing structure of infant universe 13,000,000,000.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d2c5503460f94a01854/html5/thumbnails/4.jpg)
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Cosmic Convergence: 3 lines of evidence tell the same tale
![Page 5: Dark Energy Dr. Fred Raab. 2 Three types of measurements… Relic Light from Big Bang Imaged by WMAP satellite showing structure of infant universe 13,000,000,000.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d2c5503460f94a01854/html5/thumbnails/5.jpg)
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Parting thoughts
• Three independent lines of evidence agree that:» Expansion of universe is accelerating
» About 25% of the density of “stuff” in the universe is made of matter
» Most of the matter is “dark matter”, unlike any other form of matter discovered to date
» About 75% of the density of “stuff” in the universe is “dark energy”, unlike any other form of energy discovered to date
» “Dark energy” powers the accelerating expansion of the universe.
Is the universe blowing up?
Stay tuned…