They don't know what Dark matter is yet it can weigh as much as 100 Trillion of our suns...? How'd they pull That one out of their @sses?
They don't know what Dark matter is yet it can weigh as much as 100 Trillion of our suns...? How'd they pull That one out of their @sses?Because gravity is proportional to mass, and gravity bends light. We can accurately measure the bending of light from distant sources, so we can accurately measure the intervening mass, even if we don't know just what it is. Pretty clever, huh?