What is a spiral galaxy?
Spiral galaxy is one of the three types of galaxy cataloged by Edwin Hubble. These galaxies seem to be the most abundant in the universe and, as their name suggests, have a distinctive spiral shape, with hands around a very thick nucleus. Our home galaxy, the Milky Way, is an example of a spiral galaxy. Estimates of the percentage of galaxies that occupy this shape differ considerably, but most of them are above 50%. Several functions distinguish the spiral galaxy from other types of galaxies. The first is a galactic core, which consists of a bulge of very old stars arranged around a supermassive black hole. When a spiral galaxy looks from the side, the distinctive bulge is very obvious. The core is surrounded by arms that can wrap firmly or freely depending on a number of factors. These weapons have much younger stars than the galactic core.
spiral galaxies are surrounded by older stars, most of which are arranged to exthe dense groups known as globular clusters. These clusters may sometimes be difficult to identify because the stars are so densely packed that they can look like the only point. It is gas and dust throughout the galaxy. The exact shape and size of the spiral galaxy can be influenced by the presence of neighboring galaxies and there may be large variations within the galaxy. For example, some areas seem hostile to create planets, while others are more friendly to the planetary formation.
Many spiral galaxies receive a fogged shape. In the fogged spiral galaxy, instead of having a round core, the core of the galaxy is actually in the shape of a bar, and when you can see from the side, the bulge is strongly similar to the peanut. The Milky Way falls under this classification. Spiral galaxies are classified as SA, SB or SC, depending on how tightly packed arms are, with SC spiral galaxies have the most famous configuration. Barred are marked SBA, SBB and SBC.
It may take time to knowDo you go to which Galaxy class and fall. In part, identification is dependent on the perspective, because the view from the side can be covered by the details of the structure of the galaxy, while the galaxy looks like a bright line of stars. Scientists are constantly looking for new galaxies and learn more about structures in individual galaxies, as the observation devices improve and how more and more images of the universe are growing.