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Explanation: The latest map of the cosmos again indicates that dark matter and dark energy dominate our universe. The Sloan Digital Sky Survey (SDSS) is on its way to measuring the distances to over one million galaxies. Galaxies first identified on 2D images, like the one shown above on the right, have their distances measured to create the 3D map. The SDSS currently reports 3D information for over 200,000 galaxies, now rivaling the 3D galaxy-count of the Two-Degree Field sky map. The latest SDSS map, shown above on the left, could only show the galaxy distribution it does if the universe was composed and evolved a certain way. After trying to match many candidate universes to it, the Cinderella universe that best fits the above map has 5% atoms, 25% dark matter, and 70% dark energy. Such a universe was previously postulated because its rapid recent expansion can explain why distant supernovas are so dim, and its early evolution can explain the spot distribution on the very distant cosmic microwave background.
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: SDSS - universe - dark energy
Publications with words: SDSS - universe - dark energy
See also:
- APOD: 2024 December 1 Á Cosmic Latte: The Average Color of the Universe
- APOD: 2024 October 20 Á Dark Matter in a Simulated Universe
- APOD: 2024 July 1 Á Time Spiral
- APOD: 2023 December 31 Á Illustris: A Simulation of the Universe
- APOD: 2023 July 5 Á A Map of the Observable Universe
- APOD: 2023 June 29 Á A Message from the Gravitational Universe
- APOD: 2023 June 4 Á Color the Universe