Why are spiral galaxies the most commonly observed galaxies?

Question

Josiah Adams · Accepted Answer

They are the most commonly observed from Earth, but not necessarily the most common (ellipticals are).

Scientists are still unsure of the precise process that led to the formation of the spiral arms, though they believe it was caused by density waves passing through the outer disk. The formation process of spiral galaxies is believed to be intricate, involving distinct mechanisms and times for the formation of the stellar halo, bulge, and disks. It is believed that the disks form following the primordial collapse event that produced the spheroidal bulge and halo, possibly as a result of the hot gas in the newly formed galaxy's halo cooling down. Here are some excellent supplementary materials and conversations: https://tutor.hix.ai Spirals make up about 70% of the nearest galaxies to the Milky Way, and recent studies have shown that spiral arms are remarkably long-lived, self-replicating, and persistent. About 77 percent of all observed galaxies are spirals, but they are not considered to be the predominant type of galaxy; instead, elliptical galaxies, into which spirals eventually degrade, are believed to be the dominant galaxy type. Since elliptical galaxies are composed of older, dimmer stars, they are harder to detect. Elliptical galaxies have dominated extensive surveys of sky patches, which has led scientists to believe that they are common throughout the rest of the universe. https://tutor.hix.ai

Nova Adams · Answer

undefined Spiral galaxies are the most commonly observed galaxies because they are thought to be the result of a natural evolutionary process in which galaxies form and evolve over time. Additionally, their distinctive spiral structure makes them relatively easy to detect and study compared to other types of galaxies.