Big Bang Theory
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The Big Bang theory proposes that the universe began as an extremely hot and dense singularity around 13.75 billion years ago and has been expanding ever since. It is supported by evidence such as Hubble's Law that galaxies are moving away from us and the discovery of cosmic microwave background radiation, which is leftover radiation from the early universe. Some criticisms of the theory are that it does not fully explain the formation of structures like galaxies. The theory also depends on assumptions about the universality of physical laws and the cosmological principle.
Big Bang Theory
- 1. The Big Bang Theory By: Vishnuraayan.G. 12410034
- 2. The Big Bang Theory The Big Bang theory is the most accepted scientific theory out of the three..
- 3. The Big Bang Theory -Georges Lemaitre came up with the Big Bang Theory in 1921 The Big Bang Theory: Matter from all the universe came from a very hot central point. Sooner or later, the central point began to cool… 15 billion years ago those atoms were drawn together by gravity. This region exploded and matter was thrown outward
- 4. Explanation • According to the Big Bang theory, the Universe was once in an extremely hot and dense state which expanded rapidly. This rapid expansion caused the Universe to cool and resulted in its present continuously expanding state. According to the most recent measurements and observations, the Big Bang occurred approximately 13.75 billion years ago
- 5. Graphic scheme illustrating expansion of UNIVERSE from the time of BIG BANG
- 6. Assumptions The Big Bang theory depends on two major assumptions: The universality of • Physical laws • Cosmological principle
- 7. Cosmological Composition Sales Dark Energy Dark Matter Free Hydrogen and Helium Others
- 8. Misconceptions about BBT • The BBT is not about the origin of the universe. Rather, its primary focus is the development of the universe over time. • BBT does not imply that the universe was ever point-like. • The origin of the universe was not an explosion of matter into already existing space.
- 9. The Big Bang Theory- Proof In 1929, Edwin Hubble discovered that the universe is expanding. Galaxies appear to be moving away from us at speeds proportional to their distance. This is called "Hubble's Law," Red shift also tells us that objects are moving away from us.
- 10. • If the universe was initially very, very hot as the Big Bang suggests, we should be able to find some remnant of this heat. • The universe is filled with such radiation that is left-over from the Big Bang called Cosmic Microwave Background Radiation, which was discovered in the 1960’s
- 11. Weaknesses of the Big Bang Theory • If the universe really was created by an explosion, and was spread evenly, then there shouldn’t be clusters of galaxies, stars, planets, etc. • There are also two other scientific theories explaining how the universe could have been created.
- 12. Random Facts About the Big Bang Theory • If we were to look at the universe one second after the Big Bang, what we would see is a 10 billion degree sea of neutrons, protons, electrons, anti-electrons, photons, and neutrinos. • Some scientists believe that the universe may contract back to a central point. Scientists like to call this the “Big Crunch”.
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