January 01, 2018

New Clues to Universe's Structure Revealed


  

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- Martin

Three from NASA's Jet Propulsion Laboratory in Pasadena, California, are part of this group that is helping to further our understanding of the structure of the universe. Leading models of the universe suggest it is mostly composed of entities they cannot see: dark matter and dark energy. Dark matter acts like glue, holding galaxies and galaxy clusters together gravitationally, while dark energy is thought to be responsible for the accelerated expansion of the universe. In a strong prediction of scientists, they came from the European Space Agency's Planck satellite, which looks at the light from about 400,000 years after the Big Bang. Scientists find that about 70 percent of the energy in the universe is contained in dark energy. About 25 percent is composed of the mysterious dark matter, with normal matter making up the remainder.

The results of those clues are especially important to scientific community because they mark the first time that observations from the more recent universe. The results come from the first year, which uses a 570 -megapixel camera mounted on the 4 meter Blanco Telescope, its data are processed at the National Center for Supercomputing Applications. To measure dark matter, scientists first created maps of galaxy positions using gravitational lensing and galaxy clustering. The DES team developed new ways to detect the tiny lensing distortions of galaxy images, and the new dark matter map is 10 times the size of the one DES released in 2015 and continues to grow.

by Dini Dwintika Karuniati
16611042


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