Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.astronet.ru/db/xware/msg/1173934
Дата изменения: Wed Jan 2 04:50:11 2002
Дата индексирования: Sun Feb 3 11:09:18 2013
Кодировка:

Поисковые слова: п п п п
Finding Dark Matter
Astronomy Picture of the Day
    


Finding Dark Matter
<< Yesterday 18.12.2001 Tomorrow >>
Finding Dark Matter
Credit & Copyright: A. J. Benson (Caltech) et al., U. Durham, PPARC
Explanation: Where is dark matter? Galaxies rotate and move in clusters as if a tremendous amount of unseen matter is present. But does dark matter exist in the greater universe too -- and if so, where? The answer can be found by comparing the distribution of galaxies observed with numerical simulations. This comparison became much more accurate recently when over 100,000 galaxy observations from the 2-Degree Field Galactic Redshift Survey were used. In the above frame from a computer simulation of our universe, a 300 million light-year slice shows dark matter in gray and galaxies as colored circles. The red box indicates the location of a rich cluster of galaxies, while the green box shows a more typical cross-section of our universe. Analyses indicate that the immense gravity of the pervasive dark matter pulls normal matter to it, so that light matter and dark matter actually cluster together.

January
February
March
April
May
June
July
August
September
October
November
December
 < December 2001  >
Mo Tu We Th Fr Sa Su





12
3456789
10111213141516
17181920212223
24252627282930
31





Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
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: universe - dark matter - 2dF survey - simulation
Publications with words: universe - dark matter - 2dF survey - simulation
See also:
All publications on this topic >>