Chandra

Chandra is an x-ray observatory run by NASA with the goal to accumulate clues to the form of dark matter by looking at its effects on galaxies and its gravitational lensing effect. Chandra recently made a breakthrough that further proves the existence of dark matter. An x-ray observation of galaxy NGC 720 showed that the galaxy was enveloped in a cloud of hot gas that had a different orientation than that of visual observations of the galaxy. The only way that the hot gas could be contained in the galaxy would be through the gravitational force exerted by dark matter. These results contradict the MOND theory, while reinforcing the idea of cold dark matter (WIMPs).