1) we can see the universe mostly in the form hydrogen and helium. So it is protonic. 2) a) Light from when the Universe became transparent very soon after the Big bang. 3) The cosmological principle limits the faintness of distant objects. 4) These group elementys are made by adding oxygen nuclei which is the third most commen element in the universe. Solution 1) we can see the universe mostly in the form hydrogen and helium. So it is protonic. 2) a) Light from when the Universe became transparent very soon after the Big bang. 3) The cosmological principle limits the faintness of distant objects. 4) These group elementys are made by adding oxygen nuclei which is the third most commen element in the universe..