H e l p m e p l e a s e What must be true in order for the big bang theory to be a valid explanation of how the universe was formed?
O All light travels at a constant speed in a vacuum.
O Hydrogen and helium are the most abundant elements in stars.
O Matter in the universe is homogeneous and isotropic when averaged over very large scales.
O Energy released in nuclear processes is equal to mass converted times the speed of light squared