Which events support the big bang theory? 1)In the 1960s, Arno Penzias and Robert Wilson used a radio telescope to discover the presence of background radio emissions coming from all directions in the sky.

2)In 1934, Fritz Zwicky suggested the presence of unseen matter in the universe, which later came to be known as dark matter.

3)In 1912, Vesto Slipher discovered that the wavelengths of light coming from spiral nebulae suggest that they are moving away.

4)In 1924, Edwin Hubble discovered that galaxies exist outside the Milky Way which are millions of light years away.

and How have telescopes assisted scientists in learning about the origins of the universe?