Cosmology A Very Short Introduction Pdf 〈2024〉

Cosmology: A Very Short Introduction PDF**

The expansion of the universe is a fundamental aspect of the Big Bang theory. The universe is not expanding into anything; rather, the distance between galaxies is increasing as the universe expands. cosmology a very short introduction pdf

In the 1920s, Belgian priest and astronomer Georges Lemaitre proposed that the universe is expanding. He observed that the light coming from distant galaxies was shifted towards the red end of the spectrum, a phenomenon known as redshift. This suggested that those galaxies were moving away from us. Cosmology: A Very Short Introduction PDF** The expansion