Alas Rojas. Basic Intro Supernovae. Sloam SKY survery. For thousands of years, astronomers wrestled with basic questions about the size and age of the universe. Does the universe go on forever, or does it have an edge somewhere? Has it always existed, or did it come to being some time in the past? In 1929, Edwin Hubble, an astronomer at Carnegie Observatories, made a critical discovery that soon led to scientific answers for these questions: he discovered that the universe is expanding. The ancient Greeks recognized that it was difficult to imagine what an infinite universe might look like. But they also wondered that if the universe were finite, and you stuck out your hand at the edge, where would your hand go? The Greeks' two problems with the universe represented a paradox - the universe had to be either finite or infinite, and both alternatives presented problems.
After the rise of modern astronomy, another paradox began to puzzle astronomers. The expanding universe is finite in both time and space. Ciencia Kanija - Toda la ciencia a tu alcance. Los Números Primos.