Which characteristics are considered most typical of an old galaxy in decline?(1 point)
Responses
shrinking in size, high dust content
shrinking in size, high dust content
very bright, relatively small
very bright, relatively small
spiral, abundant planets present
spiral, abundant planets present
low gas content, little star formation
low gas content, little star formation
The characteristics considered most typical of an old galaxy in decline are:
1. Shrinking in size: As a galaxy ages and goes into decline, it tends to decrease in size. This can be due to various factors, including interactions with other galaxies or the exhaustion of its own resources.
2. High dust content: Older galaxies often have a high concentration of interstellar dust. This dust can obscure light and affect the visibility of objects within the galaxy.
3. Very bright, relatively small: In some cases, old galaxies may appear very bright despite their smaller size. This brightness can be attributed to a high concentration of older stars that are more easily detectable.
4. Low gas content, little star formation: As a galaxy ages, it may experience a depletion of its gas reservoirs, resulting in reduced star formation activity. This decline in gas content can be a characteristic feature of an old galaxy.
To summarize, the most typical characteristics of an old galaxy in decline are shrinking in size, high dust content, being very bright but relatively small, and having low gas content with little star formation.