Saturday 20 July 2013

Black Background Wallpapers Free Black Wallpapers Photos Images Pictures

Black Background Wallpapers Biography

Source (Google.com.pk)
In astronomy and cosmology, dark matter is a type of matter hypothesized to account for a large part of the total mass in the universe. Dark matter cannot be seen directly with telescopes; evidently it neither emits nor absorbs light or other electromagnetic radiation at any significant level. Instead, its existence and properties are inferred from its gravitational effects on visible matter, radiation, and the large-scale structure of the universe. According to the Planck mission team, and based on the standard model of cosmology, the total mass–energy of the universe contains 4.9% ordinary matter, 26.8% dark matter and 68.3% dark energy. Thus, dark matter is estimated to constitute 84.5% of the total matter in the universe and 26.8% of the total content of the universe.
Astrophysicists hypothesized dark matter due to discrepancies between the mass of large astronomical objects determined from their gravitational effects and the mass calculated from the "luminous matter" they contain: stars, gas, and dust. It was first postulated by Jan Oort in 1932 to account for the orbital velocities of stars in the Milky Way and by Fritz Zwicky in 1933 to account for evidence of "missing mass" in the orbital velocities of galaxies in clusters. Subsequently, many other observations have indicated the presence of dark matter in the universe, including the rotational speeds of galaxies by Vera Rubin,in the 1960s–1970s, gravitational lensing of background objects by galaxy clusters such as the Bullet Cluster, the temperature distribution of hot gas in galaxies and clusters of galaxies, and more recently the pattern of anisotropies in the cosmic microwave background. According to consensus among cosmologists, dark matter is composed primarily of a not yet characterized type of subatomic particle. The search for this particle, by a variety of means, is one of the major efforts in particle physics today.high defination wallpaper desktop background from our huge wallpaper library. Download Lime High Defination Wallpaper Desktop Background from the above wallpaper resolutions. If you do not find the exact dimension you are looking for, then go for 'Original File' or higher resolution which may fits perfect to your desktop screen.
Detail File :
The file name Lime High Defination Wallpaper Desktop Background file size is 274 kB, and resolution 1920x1080 scaled to 1920x1080, and file extension is JPG/JPEG, published on 05 Jun, 2013. This high quality wallpapers has been viewed in 1,505 times - 11 day, 18 hour, 17 minute, 14 second ago, and downloaded in 469 times.
Black Background Wallpapers Free Black Wallpapers Photos Images Pictures
Black Background Wallpapers Free Black Wallpapers Photos Images Pictures
Black Background Wallpapers Free Black Wallpapers Photos Images Pictures
Black Background Wallpapers Free Black Wallpapers Photos Images Pictures
Black Background Wallpapers Free Black Wallpapers Photos Images Pictures
Black Background Wallpapers Free Black Wallpapers Photos Images Pictures
Black Background Wallpapers Free Black Wallpapers Photos Images Pictures
Black Background Wallpapers Free Black Wallpapers Photos Images Pictures
Black Background Wallpapers Free Black Wallpapers Photos Images Pictures
Black Background Wallpapers Free Black Wallpapers Photos Images Pictures
Black Background Wallpapers Free Black Wallpapers Photos Images Pictures

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