Created the most precise 3D-map of our universe


31/05/2011

Astronomers have presented the most complete 3D-map of the universe (the length of about 380 million light-years) ever created. Its development took more than ten years. This project was called 2MASS Redshift Survey (2MRS). Karen Masters of the University of Portsmouth in the UK, has introduced a new card at a press conference 218 meeting of the American Astronomical Society.

"2MRS - this is an extremely accurate representation of the local universe, especially in the area of the galactic plane," - said the Masters. Galaxy redshift of light exposed when the wavelength increases with the expansion of the universe. The farther the galaxy, the greater the redshift, so redshift allows you to measure the distance to distant galaxies - the third dimension to the 3D-map. In the course of this study was to scan the entire sky in near-infrared wavelength range using automated telescopes, one of which is named after the Whipple Observatory on Mount Hopkins, Arizona, and the second in the Inter-American Observatory Cerro Tololo in Chile. The light in the near infrared region of the spectrum passes through the dust better than visible light, allowing you to get more complete information about remote objects.

On this map are displayed in the details previously hidden from us the regions that will allow a better understanding of the mechanics of the movement of our galaxy. The Milky Way motion relative to the rest of the universe, has long puzzled astronomers since, according to the calculations, it can not be explained by the gravitational pull of any visible matter. Massive local structures, like the Hydra-Centaurus supercluster ("Great Attractor"), which was previously hidden, now plotted on the map, thanks to this project.

Original: Physorg


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