ET is not on the phone. But nonetheless scientists are excited about a “mysterious” X-ray signal found when a team sifted through old data from NASA’s Chandra X-ray Observatory and the European Space Agency’s XMM-Newton.
Astronomers think it might be evidence of sterile neutrinos — dark matter, that stuff that makes up about 85% of the Universe, but does not emit or absorb light.
“We know that the dark matter explanation is a long shot, but the pay-off would be huge if we’re right,” says Esra Bulbul of the Harvard-Smithsonian Center for Astrophysics, who led the study. “So we’re going to keep testing this interpretation and see where it takes us.”
A paper explaining the research is published in the Astrophysical Journal.
You can read more here.