Big Bang Theory Evidence

Front

As galaxies move away from our galaxy, this phenomenon is called _____________.

Back

redshift

Front

By the term universe, astronomers mean _____________.

Back

everything we can observe

Front

The Astronomical Unit (AU) is defined by astronomers as _____________.

Back

the average distance between the Earth and the Sun

Front

The Big Bang Theory explains the formation of the _____________.

Back

Universe

Front

A light year is _____________.

Back

the distance that light travels in one year

Front

What is the significance of redshift in astronomy?

Back

Redshift indicates that an object is moving away from the observer, providing evidence for the expansion of the universe.

Front

What does the Big Bang Theory suggest about the beginning of the universe?

Back

It suggests that the universe began as a singularity and has been expanding ever since.

Front

What is the difference between a galaxy and the universe?

Back

A galaxy is a collection of stars, gas, and dust bound together by gravity, while the universe encompasses all galaxies and everything else that exists.

Front

What is the approximate distance of one Astronomical Unit (AU)?

Back

About 93 million miles or 150 million kilometers, which is the average distance from the Earth to the Sun.

Front

What does the term 'light year' measure?

Back

It measures distance, specifically how far light travels in one year.