2023-09-02 17:09:00 Certain models of dark matter postulate the existence of very heavy particles which would pass through matter and be indistinguishable from Big Bang neutrinos in detectors on Earth. But these particles could transform neutron stars into black holes of abnormally low masses, like those that are perhaps detected with gravitational waves. In retrospect, … Read more
2023-08-05 17:09:40 Kaiju stars are abnormally bright stars for their mass and size. They are rare but the James-Webb Space Telescope looked at two of them recently using the gravitational lensing effect. The observations obtained refute certain models of dark matter particles by placing bounds on the masses of the particles of these models. You … Read more
2023-06-30 09:49:12 ESA will launch its next space mission, Euclid, on July 1. This unprecedented satellite, produced under the project management of Thales Alenia Space, aims to better understand the dark Universe, that is to say dark matter and dark energy, about which we know very little about their real nature. Euclid will take off … Read more