Big Bang Theory

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What is the Big Bang Theory?

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The Big Bang Theory is the leading explanation for the origin of the universe, stating that it began as a singularity approximately 13.8 billion years ago and has been expanding ever since.

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Who proposed the Big Bang Theory?

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Georges Lemaître, a Belgian priest and astronomer, is credited with proposing the Big Bang Theory in the 1920s.

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What did Edwin Hubble discover about galaxies?

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Edwin Hubble discovered that galaxies are moving farther away from us, which provided evidence for the expansion of the universe.

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NGSS.HS-ESS1-2

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What is the significance of Hubble's Law?

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Hubble's Law states that the farther away a galaxy is, the faster it is moving away from us, indicating that the universe is expanding.

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What is a galaxy?

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A galaxy is a massive system that consists of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity.

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NGSS.MS-ESS1-2

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What is the name of our galaxy?

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The name of our galaxy is the Milky Way Galaxy.

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NGSS.MS-ESS1-2

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What is a telescope?

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A telescope is an instrument that gathers and magnifies light from distant objects, allowing astronomers to observe celestial bodies.

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What do astronomers study?

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Astronomers study celestial objects, space, and the universe as a whole, including stars, planets, galaxies, and cosmic phenomena.

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What is cosmic background radiation?

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Cosmic background radiation is the afterglow of the Big Bang, a faint microwave radiation that fills the universe and provides evidence for the Big Bang Theory.

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NGSS.HS-ESS1-2

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What is dark matter?

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Dark matter is a form of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects on visible matter.