Recent content by picass

If after the big-bang, anti mass would have had the upperhand, would the universe, as we can observe, it have another aspect ?

Has anyone an idea why speed of light is constant ? Has this something to do with lack of mass of a photon because I cannnot imagine it to be possible to add speed to something that has no mass. As light emerges from energy fall of an electron, does speed of light have anything to do with...

supernova How do you come to that 25 ly ? Can you calculate that distance or did you come to that figure by observation of existing supernovae and their effects. Another question : how can galaxies collide as they move away one from another because of the expanding universe

As in quantum mechanics a photon can find itself at 2 different places at the same time, does time then exists at that level ?

what is the distance at which the explosion of a supernova could wipe out all life on Earth ?