Question
Which evidence supports the big bang theory?
Planetesimals form in debris disks.
Most galaxies are moving toward us.
Uniform background radiation is detected in every direction.
Galaxies spin faster than they should based on visible matter.
Planetesimals form in debris disks.
Most galaxies are moving toward us.
Uniform background radiation is detected in every direction.
Galaxies spin faster than they should based on visible matter.
Answers
GPT-4o mini
The evidence that supports the Big Bang theory among the options you provided is **"Uniform background radiation is detected in every direction."**
This refers to the Cosmic Microwave Background Radiation (CMB), which is the afterglow of the hot, dense state of the universe shortly after the Big Bang. It is a key piece of evidence for the Big Bang theory, as it provides a snapshot of the early universe and shows that it was once in a much hotter and denser state.
The other options you mentioned do not directly support the Big Bang:
1. **Planetesimals form in debris disks** - This relates more to the formation of solar systems and planets, rather than the Big Bang itself.
2. **Most galaxies are moving toward us** - This statement is not accurate; observations indicate that most galaxies are actually moving away from us, which supports the expanding universe model, a concept tied to the Big Bang.
3. **Galaxies spin faster than they should based on visible matter** - This indicates the presence of dark matter and relates to galaxy dynamics, but it does not specifically support the Big Bang theory itself.
Thus, the detection of uniform background radiation is the most relevant evidence supporting the Big Bang theory.
This refers to the Cosmic Microwave Background Radiation (CMB), which is the afterglow of the hot, dense state of the universe shortly after the Big Bang. It is a key piece of evidence for the Big Bang theory, as it provides a snapshot of the early universe and shows that it was once in a much hotter and denser state.
The other options you mentioned do not directly support the Big Bang:
1. **Planetesimals form in debris disks** - This relates more to the formation of solar systems and planets, rather than the Big Bang itself.
2. **Most galaxies are moving toward us** - This statement is not accurate; observations indicate that most galaxies are actually moving away from us, which supports the expanding universe model, a concept tied to the Big Bang.
3. **Galaxies spin faster than they should based on visible matter** - This indicates the presence of dark matter and relates to galaxy dynamics, but it does not specifically support the Big Bang theory itself.
Thus, the detection of uniform background radiation is the most relevant evidence supporting the Big Bang theory.