Question
Below is an image of a spiral galaxy located about seven million light years away, known as NGC 300
9. Look at the image tr carefully. Mark your
A
B
Image scurtesy of NASA
If the galaxy is observed over time, which of the following observations would most strongly suggest that gravitational forces are acting throughout it?
A. supernovae explosions
B. the rotation of the galaxy
C. the expansion of the galaxy
D. the expansion of the universe
9. Look at the image tr carefully. Mark your
A
B
Image scurtesy of NASA
If the galaxy is observed over time, which of the following observations would most strongly suggest that gravitational forces are acting throughout it?
A. supernovae explosions
B. the rotation of the galaxy
C. the expansion of the galaxy
D. the expansion of the universe
Answers
GPT-4o mini
The observation that would most strongly suggest that gravitational forces are acting throughout the galaxy is:
**B. the rotation of the galaxy**
The rotation of a galaxy provides evidence of the gravitational forces at play, as the stars and other matter within the galaxy are held together and influenced by gravity. Observing how stars orbit the center of the galaxy allows astronomers to infer the presence of mass (including dark matter) that contributes to the overall gravitational influence within the galaxy.
**B. the rotation of the galaxy**
The rotation of a galaxy provides evidence of the gravitational forces at play, as the stars and other matter within the galaxy are held together and influenced by gravity. Observing how stars orbit the center of the galaxy allows astronomers to infer the presence of mass (including dark matter) that contributes to the overall gravitational influence within the galaxy.