Which sentence about galaxies provides evidence of universe expansion that supports the Big Bang Theory?(1 point)
Responses
Galaxies are in constant motion.
Galaxies are moving at different speeds and in different directions.
Galaxies are moving more slowly than they have in the past.
Galaxies are moving away from each other.
Galaxies are moving away from each other.
The sentence that provides evidence of universe expansion that supports the Big Bang Theory is "Galaxies are moving away from each other."
To understand why this sentence supports the Big Bang Theory, we need to know a bit about the theory itself. The Big Bang Theory states that the universe originated from a hot, dense state about 13.8 billion years ago and has been expanding ever since. According to this theory, all matter and energy in the universe started from a single point and began to rapidly expand.
Now, when we observe galaxies in the universe, we can measure their motions and positions. Scientists have observed that most galaxies are moving away from each other. This movement, known as the redshift, indicates that the space between the galaxies is expanding.
The further away a galaxy is from us, the faster it appears to be moving away from us. This observation aligns with the concept of a continuously expanding universe described by the Big Bang Theory. Therefore, the sentence "Galaxies are moving away from each other" provides evidence of universe expansion that supports the Big Bang Theory.
The sentence that provides evidence of universe expansion that supports the Big Bang Theory is:
"Galaxies are moving away from each other."