Stora attraktorn
Stora attraktorn är en ansamling av galaxer som ligger 150 - 350 miljoner ljusår bort i riktning mot stjärnbilderna Hydra och Kentauren. Denna massansamling orsakar att Vintergatan rör sig i förhållande till den kosmiska bakgrundsstrålningen.
Stora attraktorn rör sig i sin tur i riktning mot Shapleysuperhopen, som är en samling av över 8 000 galaxer.[1]
Källor
Fotnoter
- ^ Brian Koberlein (23 december 2015). ”What is the Great Attractor?” (på engelska). Universe Today. http://www.universetoday.com/113150/what-is-the-great-attractor/. Läst 15 november 2016.
Externa länkar
- Cosmography of the Local Universe (video) (engelska)
Media som används på denna webbplats
2MASS LSS chart-NEW Nasa.jpg
Panoramic view of the entire near-infrared sky reveals the distribution of galaxies beyond the Milky Way. The image is derived from the 2MASS Extended Source Catalog (XSC)—more than 1.5 million galaxies, and the Point Source Catalog (PSC)--nearly 0.5 billion Milky Way stars. The galaxies are color coded by redshift (numbers in parentheses) obtained from the UGC, CfA, Tully NBGC, LCRS, 2dF, 6dFGS, and SDSS surveys (and from various observations compiled by the NASA Extragalactic Database), or photo-metrically deduced from the K band (2.2 μm). Blue/purple are the nearest sources (z < 0.01); green are at moderate distances (0.01 < z < 0.04) and red are the most distant sources that 2MASS resolves (0.04 < z < 0.1). The map is projected with an equal area Aitoff in the Galactic system (Milky Way at center).
Panoramic view of the entire near-infrared sky reveals the distribution of galaxies beyond the Milky Way. The image is derived from the 2MASS Extended Source Catalog (XSC)—more than 1.5 million galaxies, and the Point Source Catalog (PSC)--nearly 0.5 billion Milky Way stars. The galaxies are color coded by redshift (numbers in parentheses) obtained from the UGC, CfA, Tully NBGC, LCRS, 2dF, 6dFGS, and SDSS surveys (and from various observations compiled by the NASA Extragalactic Database), or photo-metrically deduced from the K band (2.2 μm). Blue/purple are the nearest sources (z < 0.01); green are at moderate distances (0.01 < z < 0.04) and red are the most distant sources that 2MASS resolves (0.04 < z < 0.1). The map is projected with an equal area Aitoff in the Galactic system (Milky Way at center).