EVIDENCES OF BIG BANG THEORY

VESTO SLIPHER AND CARL WILHELM WIRTZ (1910) VS/CWW

• measurement of redshift.

• observed that most spiral galaxies were moving away from the earth.

• Idea that the universe is dynamic

GEORGES LEMAITRE (1927)

• Belgian priest who proposed alternative idea that the universe is expanding - singularity. (not moving)

EDWIN HUBBLE (1929)

• used the redshift to calculate the distances between the earth and other galaxies.

ROBERT WILSON AND ARNO PENZIAS (1965)

• discovered the cosmic microwave background radiation (CMBR) - a low, steady humming noise believed to be a remains from big bang.

• From a holmdel horn antenna

MODERN ASTRONOMERS (2014)

• universe is estimated to be 13.8 billion years old with 5% of its composition existing as ordinary matter.