Front

What is the Big Bang Theory?

Back

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

Front

What evidence supports the Big Bang Theory?

Back

Evidence includes the cosmic microwave background radiation, the abundance of light elements (hydrogen and helium), and the observed expansion of the universe.

Front

What is redshift?

Back

Redshift is the phenomenon where light from an object moving away from an observer is stretched to longer wavelengths, making it appear redder.

Front

What is blueshift?

Back

Blueshift is the phenomenon where light from an object moving toward an observer is compressed to shorter wavelengths, making it appear bluer.

Front

What elements were formed first in the universe according to the Big Bang Theory?

Back

The first elements formed were hydrogen and helium.

Front

What does the term 'cosmic microwave background radiation' refer to?

Back

It refers to the afterglow radiation from the Big Bang, which fills the universe and can be detected in all directions.

Front

How does the expansion of the universe provide evidence for the Big Bang Theory?

Back

The expansion indicates that the universe was once concentrated in a small space, supporting the idea of a singular beginning.

Front

What is the significance of the abundance of hydrogen and helium in the universe?

Back

Their relative abundance supports the Big Bang Theory, as these elements were formed in the first moments after the Big Bang.

Front

What is Hubble's Law?

Back

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

Front

What is the role of supernovae in understanding the universe's expansion?

Back

Supernovae serve as 'standard candles' for measuring distances in the universe, helping to determine the rate of expansion.