Front

What is the Big Bang Theory?

Back

A theory that states the universe began as a small point that expanded rapidly about 13.7 billion years ago.

Front

What does it mean that the universe is expanding?

Back

The amount of space between galaxies is increasing.

Front

What does redshift indicate about a galaxy?

Back

A redshifted galaxy is moving away from us.

Front

What can we conclude from the observation that nearly all galaxies are moving away from us?

Back

The once-smaller universe is expanding in all directions.

Front

What is the Cosmic Microwave Background (CMB)?

Back

The CMB is the afterglow radiation from the Big Bang, filling the universe.

Front

What is the significance of the abundance of elements in the universe?

Back

It provides evidence for the processes that occurred during the Big Bang.

Front

What is a singularity in the context of the Big Bang Theory?

Back

A point in the universe where density and gravity are thought to be infinite.

Front

What is the role of dark energy in the universe?

Back

Dark energy is believed to be responsible for the accelerated expansion of the universe.

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.

Front

What is the difference between redshift and blueshift?

Back

Redshift indicates an object is moving away, while blueshift indicates it is moving closer.