Which is a mark of a galaxy formed by collapse?(1 point) Responses same age stars same age stars uniformly young stars uniformly young stars a mix of young and old stars a mix of young and old stars abundant gas and dust
a mix of young and old stars
A mark of a galaxy formed by collapse is a mix of young and old stars.
The mark of a galaxy formed by collapse is the presence of a mix of young and old stars along with abundant gas and dust. This combination suggests that the galaxy has gone through a process of star formation over an extended period of time. To determine this answer, we need to understand the different characteristics of galaxies formed by collapse.
To begin, we should know that galaxies are large systems of stars, gas, and dust bound together by gravity. There are various types of galaxies, and their formation can occur through different mechanisms. In this case, we are specifically talking about galaxies formed by collapse.
When a galaxy forms by collapse, it means that it originates from a cloud of gas and dust that collapses under its own gravitational pull. This collapse leads to the formation of stars within the galaxy. Over time, as the stars continue to form and evolve, different generations of stars with various ages are present within the galaxy.
One characteristic of such galaxies is the presence of a mix of young and old stars. Young stars are relatively recently formed and are often found in regions with active star formation, while old stars have been around for a longer time. So, a galaxy formed by collapse would show a combination of both young and old stars.
Additionally, galaxies formed by collapse tend to have abundant gas and dust. These materials are the building blocks for star formation, and their abundance indicates that the galaxy still has the potential for ongoing star formation.
Therefore, in summary, a mark of a galaxy formed by collapse is the presence of a mix of young and old stars along with abundant gas and dust.