Name this Law. Explain your answer. Explain how astronomers use Cepheid variables to determine distance. Create an electronic report that describes the HST finding and how it relates to the balloon activity you just completed. Go back to activities .
Cosmology is the search for origins.
It seems as if everyone wants to know how the Universe began. The Big Bang theory is the result of several important observations. In 1927, Edwin Hubble first observed that light from distant galaxies is red shifted and that galaxies are moving farther and farther away from us. Second, he determined that the farther away a galaxy is from us, the faster it is receding from us. If the Universe is expanding, then one can assume that the galaxies that compose our Universe were once much closer together than they are now.