Which is a mark of a galaxy formed by collapse?(1 point)
Responses
same age stars
abundant gas and dust
a mix of young and old stars
uniformly young stars
a mix of young and old stars
The mark of a galaxy formed by collapse is "a mix of young and old stars."
The mark of a galaxy formed by collapse is "a mix of young and old stars" (1 point).
To determine this, you can look at the composition of stars within the galaxy. A galaxy formed by collapse will have a combination of both young and old stars. This indicates that star formation has occurred over an extended period of time.
One way to observe the composition of stars in a galaxy is through spectroscopy. Spectroscopy analyzes the light emitted by stars and breaks it down into its individual wavelengths. By studying the spectrum, scientists can determine the chemical composition of stars and their ages.
Alternatively, astronomers use telescopes to observe galaxies and study their structure and star populations. By analyzing the different colors and brightnesses of stars in a galaxy, they can determine the relative ages of the stars present.
In the case of a galaxy formed by collapse, the presence of both young and old stars suggests that the galaxy has undergone multiple generations of star formation. This is in contrast to galaxies with uniformly young stars, which would indicate recent or ongoing star formation activity.