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
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.
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
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
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
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
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