Explanation: Is the gravity of the galaxies seen in this image high enough to contain the glowing hot gas? Superposed on an optical picture of a group of galaxies is an image taken in X-ray light. This picture, taken by ROSAT, shows confined hot gas highlighted in false red color, and provides clear evidence that the gravity exerted in groups and clusters of galaxies exceeds all the individual component galaxies combined. The extra gravity is attributed to dark matter, the nature and abundance of which is one of the biggest mysteries in astronomy today.

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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.

Publikacii s klyuchevymi slovami: dark matter - gas - hot gas - dark - temnaya materiya Publikacii so slovami: dark matter - gas - hot gas - dark - temnaya materiya
Sm. takzhe: Temnaya materiya v modeli Vselennoi Velichestvennaya spiral'naya galaktika NGC 1232 Gory v NGC 2174 Delo skopleniya Pulya: ozvucheno Veshestvo v skoplenii Pulya M63: galaktika Podsolnuh ot Habbla Oblast' zvezdoobrazovaniya S106 Vse publikacii na tu zhe temu >>