Dark matter evidence from the ROSAT satellite
Bildnummer 11886947
| Dark matter evidence. Composite image showing the cluster of galaxies NGC 2300 (seen at optical wavelengths) and the recently discovered cloud of gas (magenta,in X-ray emission) in which the galaxies are embedded. The image of the gas cloud was taken by the ROSAT X-ray satellite and is considered to be strong evidence for the presence of dark matter - dark because it does not emit detectable radiation. The cloud is formed by hot gas which has a temperature of about 10 million Kelvin. The gravitational pull of the cluster is not enough to hold such a cloud together. Some astronomers have suggested that it is dark matter that prevents the cloud from dispersing in space | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / NASA |
| Bildgröße: | 2045 px × 2552 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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