What evidence do astronomers have for the big bang?

Plenty. In fact, they see evidence everywhere they look in the universe. In 1924, astronomer Edwin Hubble noticed that galaxies outside the Milky Way – our home galaxy – were zipping away in all directions, as if they originated from a singularity. Astronomers also see the big bang’s ‘’baby pictures’’ in a cosmic crackle of microwave energy and special ripples in gravity, both evidence of that ‘’inflation’’ that gave birth to the universe. The amounts of hydrogen, helium, and other elements across the universe all measure up to the big bang model. Astronomers have also failed to find any stars older than 13.8 billion years, the approximate age of the universe.


Picture Credit : Google