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Origin of the Universe

Origin of the Universe. Origin and Age of the Universe. Humans have observed celestial objects for thousands of years contemplating their place in the universe. Celestial objects are objects outside of Earth’s atmosphere including stars , planets, galaxies, etc….

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Origin of the Universe

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  1. Origin of the Universe

  2. Origin and Age of the Universe Humans have observed celestial objects for thousands of years contemplating their place in the universe. Celestial objectsare objects outside of Earth’s atmosphere including stars, planets, galaxies, etc… One theory explaining the origin of the Universe is known as the Big Bang Theory. The universe is everything that exists in any place – matter and energy alike. It is estimated that the Universe is between 10 – 13.7 billion years old.

  3. The Big Bang Theory The Big Bang Theory states that all matter and energy started out in a concentrated form in a small area. For reasons still debated, this concentrated form of matter/energy exploded leading to a series of changes: 1. After the explosion, all matter began to organize into subatomic particles (protons/electrons) and small atoms (hydrogen and helium). 2. Within one billion years after the explosion, matter (atoms) became organized into celestial bodies. 3. These new celestial bodies developed gravitational fields. Stars and solar systems became grouped within these fields. From the moment of the Big Bang, the universe continues to expand in all directions – even today!

  4. Evidence for the Big Bang Theory 1. Energy created by the Big Bang is still evident in the form of microwaves – long wavelength background radiation emitting from all parts of the universe. RT = Pg. 14

  5. Evidence for the Big Bang Theory The Doppler effect is a phenomena that illustrates the shifting wavelengths of electromagnetic energy from objects moving in an expanding universe. 2. The shifting of characteristic wavelengths (colored lines) due to the Doppler effect. The red end of the colored light spectrum indicateslonger wavelengths = celestial objects are moving away from the Earth. RT = Pg. 14 The blue end of the colored light spectrum indicatesshorter wavelengths = celestial objects are moving closer to the Earth.

  6. The Doppler Effect As the motorcycle moves closer to “Person A” the sound waves from the motorcycle compress (wavelengths decrease) – an increase in sound. For “Person B” the sound waves are spread out (wavelengths increase) and there is a decrease in sound. Person B Person A As the universe continues to expand from the Big Bang, the electromagnetic radiation of celestial objects that are closest to the Earth have smaller wavelengths (blue shift) than those that are moving away from the Earth (long wavelength – red shift). wavelength wavelength

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