In the late 1940s, a group of astronomers proposed the steady-state theory of cosmology. The crucial feature of
the steady-state theory was that the universe has always looked about the same as it does today. The theory proposed
that new matter is spontaneously created from nothing and collected into new galaxies at just the rate required
to fill the gaps left behind as existing matter is carried apart by the expansion of the universe. Working as a group, try
to come up with some ways that the steady-state theory could be tested.
