THE BIG BANG THEORY
How did the search begin? In 1912, Astronomer Vestro Slipher started studying the "Spiral Nebulae" 25 of them were travelling out in space at very high speeds
Georges Lema tra realised that the Universe is exp nding and-moving away from each other
The Birth of Galaxies Alexander Friedmann concluded with the same theory
Edward Hubble & Milton H mason observed variable stars in the Andromeda Galaxy that enabled them to study the approximate distance between galaxies. The further away the galaxy was, the faster it was moving away from. us.
THE UNIVERSE IS EXPANDING
The Cosmic Egg
All the galaxies would have been so close to each other - a giant mass of cosmos. Lema tra coined the "Primeval Atom" or "The Cosmic Egg".
e cosmos was a giant ball of mass, when it burst the parts were thrown in various directions, thus the name The Big Bang
What is Lookback time and how is it relevant? We are looking at the light that left the Sun 8 minutes ago
The redshift of distant galaxies & the cosmic background stand proof to the accuracy of The Big Bang theory