What is the Universe?
We have a problem: the XMM Newton X-Ray Telescope saw galaxy clusters were emitting more X-Rays in the past than today and this means the Universe has a higher density level than thought.
Raoul
We have a problem: the XMM Newton X-Ray Telescope saw galaxy clusters were emitting more X-Rays in the past than today and this means the Universe has a higher density level than thought.
Raoul