Complete the text with the words/phrases below. 1matter 2expanding 3once 4support 5theory 6over time 7based 8to be 9formed 10the sameBondi, set out a(n) 1)known as the steady state theory. It proposed an eternal universe 2)on the cosmological principle, originally proposed by Einstein.Their idea was that the universe is smooth and looks3)to all observers in all times and at all places.It proposed that there was the spontaneous and continuous creation of 4)In each area of space, 5)a year a new atom comes into existence which would accumulate 6)and maintain a constant density in a(n) 7)universe. As old stars and galaxies die, new ones are born and 8)by the constant regeneration of matter through this spontaneous process.This theory never gained the scientific 9)that the big bang did. It was also very difficult to prove as no one had ever observed the creation of these atoms that were supposed 10)occurring spontaneously out in space.​