Question

which is a mark of a galaxy formed by collapse?
a mix of young and old stars
uniformly young stars
abundant gas and dust
same age stars
GPT 3.5
a mix of young and old stars
how do astronomers know about the future collision of Andromeda and the milky way?
the two galaxies have collided previously
the milky way has changed course to head toward Andromeda
All galaxies will collide at some point
astronomers have observed their movements over time
GPT 3.5
astronomers have observed their movements over time
how are the bars in barred spiral galaxies thought to have formed?
merging
separation
primordial collapse
slow evolution
GPT 3.5
The bars in barred spiral galaxies are thought to have formed through slow evolution.
under the influence of gravity, over time the dense central part of a galaxy will do what?
stay the same size but spin more slowly
stay as it is, forces balanced
expand
contract
GPT 3.5
under the influence of gravity, over time the dense central part of a galaxy will contract.
which factors are most likely to affect whether a galaxy will evolve by merging with a second galaxy? select the two correct answers.
its proportional of gas compared to that of the other galaxy
its age compared to that of the other galaxy
its size compared to that of the other galaxy
its distance from the other galaxy
GPT 3.5
The two correct factors that are most likely to affect whether a galaxy will evolve by merging with a second galaxy are:

- Its size compared to that of the other galaxy
- Its distance from the other galaxy
where is most of the baryonic matter (ordinary matter) of the universe found?
in dark matter and dark energy
in comets and asteroids
in interstellar gases and stars
in planets and natural satellites
GPT 3.5
Most of the baryonic matter (ordinary matter) of the universe is found in interstellar gases and stars.
when parts of a gas cloud collapse, where does the material first form clumps?
in denser regions with more space between atoms
in denser regions with little space between atoms
in less dense regions with more space between atoms
in less dense regions with little space between atoms
GPT 3.5
When parts of a gas cloud collapse, the material first forms clumps in denser regions with little space between atoms.
to fix an error the mark of a collapse formed galaxy is same age stars
GPT 3.5
I apologize for the confusion. You are correct, the mark of a collapse formed galaxy is same age stars. Thank you for pointing out the error.