Two major scientific discoveries provide strong support for the Big Bang theory:
• Hubble’s discovery in the 1920s of a relationship between a galaxy’s distance from Earth and its speed
• the discovery in the 1960s of cosmic microwave background radiation.
1. Hubble’s discovery
- in 1924 astronomer Edwin Hubble used a technique pioneered by Henrietta Leavitt to measure distances to remote objects in the sky.
- Hubble used spectroscopic red-shift data to measure the speeds these objects were travelling then graphed their distance from Earth against their speed.
- He discovered that the speed at which astronomical objects move apart is proportional to their distance from each other
2. discovery in the 1960s of cosmic microwave background radiation
- On May 20, 1964, American radio astronomers Robert Wilson and Arno Penzias discovered the cosmic microwave background radiation (CMB)
- It states that the ancient light that began saturating the universe 380,000 years after its creation.
- It also supports the big bang theory
Thus, Two major scientific discoveries provide strong support for the Big Bang theory:
• Hubble’s discovery in the 1920s of a relationship between a galaxy’s distance from Earth and its speed
• the discovery in the 1960s of cosmic microwave background radiation.
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