Halo satellite will search for ‘missing’ normal matter

Iowa City IA (SPX) Oct 30, 2015

Studies of the early universe show that 5 percent of all mass and energy should be in normal matter-that is, the visible stuff of the universe, composed of protons and neutrons.

However, when scientists add up all the normal matter, the numbers don’t work out: About half of it is missing. One possible explanation is that the missing matter exists in huge halos of hot gas surrounding galaxi —> Read More