EVERYDAY SCIENCE

Detailed explanation-1: -By 1929, Hubble had completely reimagined our place in the universe; not only was it home to millions of other galaxies, but the universe itself was expanding as well. Contrary to the previously held view of a static universe, Hubble ultimately proved that galaxies are, in fact, moving away from us.

Detailed explanation-2: -By plotting the distance of eighteen galaxies against their red shifts, Hubble discovered a direct relationship: Galaxies were moving away from earth at a rate proportional to their distance from us. Hubble’s discovery was not just unexpected, but monumental.

Detailed explanation-3: -The first galaxies were identified in the 17th Century by the French astronomer Charles Messier, although at the time he did not know what they were. Messier, who was a keen observer of comets, spotted a number of other fuzzy objects in the sky which he knew were not comets.

Detailed explanation-4: -In one of the most famous classic papers in the annals of science, Edwin Hubble’s 1929 PNAS article on the observed relation between distance and recession velocity of galaxies-the Hubble Law-unveiled the expanding universe and forever changed our understanding of the cosmos.

Detailed explanation-5: -Hubble’s Law basically states that the greater the distance of a galaxy from ours, the faster it recedes. It was proof that the Universe is expanding. It was also the first observational support for a new theory on the origin of the Universe proposed by Georges Lemaitre: the Big Bang.