Big Bang Theory

Front

What is the Big Bang Theory?

Back

The Big Bang Theory is the leading explanation for how the universe began, proposing that it started from a singular point and has been expanding ever since.

Front

What does it mean if a galaxy is redshifted?

Back

A redshifted galaxy is moving away from us, indicating that the universe is expanding.

Front

What are the two most abundant elements in the universe?

Back

Hydrogen and Helium.

Front

How old do scientists estimate the universe to be?

Back

Approximately 13.8 billion years old.

Front

What is redshift?

Back

Redshift is the phenomenon where light from an object moving away from an observer shifts to longer wavelengths, appearing redder.

Front

What is blueshift?

Back

Blueshift is the phenomenon where light from an object moving towards an observer shifts to shorter wavelengths, appearing bluer.

Front

What evidence supports the Big Bang Theory?

Back

Evidence includes the cosmic microwave background radiation and the observed redshift of galaxies.

Front

What is the cosmic microwave background radiation?

Back

It is the afterglow radiation from the Big Bang, filling the universe and providing evidence of its early hot state.

Front

What is the significance of the 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, supporting the expansion of the universe.

Front

What role do supernovae play in understanding the universe?

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Supernovae serve as standard candles for measuring astronomical distances and help in understanding the expansion rate of the universe.