Explain why astronomers consider elliptical galaxies more abundant than spiral galaxies even though more spiral galaxies have been sighted?

Answer 1

Astronomers consider elliptical galaxies more abundant than spiral galaxies because they are more prevalent in the universe's large-scale structure and are often found in dense environments like galaxy clusters. While more spiral galaxies have been observed, this is partly due to selection bias, as spirals are more visible at certain wavelengths and are often located in less crowded regions. Elliptical galaxies, on the other hand, tend to be older and can be more difficult to detect, leading to an underrepresentation in observational surveys. Additionally, the processes of galaxy evolution suggest that many spirals may eventually evolve into ellipticals over time.