There are stars located in the center bulge of the Milky Way and the spiral arms of the Milky Way. What is the difference between the stars at the center bulge and the stars in the arms?(1 point)
Responses
The stars at the center bulge are typically colder than the stars in the arms.
The stars at the center bulge are typically colder than the stars in the arms.
The stars at the center bulge are typically brighter than the stars in the arms.
The stars at the center bulge are typically brighter than the stars in the arms.
The stars at the center bulge are typically smaller than the stars in the arms.
The stars at the center bulge are typically smaller than the stars in the arms.
The stars at the center bulge are typically older than the stars in the arms.
The stars at the center bulge are typically older than the stars in the arms.
The central bulge of the Milky Way contains a higher concentration of older stars, which are generally lower in mass and have a redder color due to their advanced stage of evolution. These stars have lower metallicity because they formed early in the galaxy's history, before many supernovae had occurred to create and distribute heavier elements.
In contrast, the spiral arms are sites of ongoing star formation and contain a mix of young, middle-aged, and old stars. The younger stars are often more massive and hotter, displaying a blue color. Moreover, these newly formed stars tend to be brighter and have higher metallicity because they have formed from interstellar material that has been enriched with heavy elements over successive generations of stellar evolution.