![]() What is the structure of a spiral galaxy? The first galaxies were actually discovered in the 17th Century, although they were not called galaxies until much later by Edwin Hubble.The closest spiral galaxy to our Milky Way is the Andromeda galaxy.Large spiral galaxies can spin their arms at a speed of more than 1.25 million miles (2 million km) per hour.The larger a galaxy is, the faster that it spins – larger galaxies can spin twice as fast as smaller ones.This was replaced in 2020 by the Wolfe Disk galaxy, which is more than 12 billion years old. It is thought to be around 11 billion years old, two billion years older than any others. The former oldest spiral galaxy in our universe is called BX422.A-type have tight arms, whereas C type have loose arms. ![]() Spiral galaxies are further classified by how tight their arms are e.g.Along with the other types of galaxy, the Spiral galaxy was first defined by Edwin Hubble in 1936.The center of a spiral galaxy is something we call the Bulge, which is a very large group of stars, giving a super bright appearance.However, upon closer inspection we confirmed that it us actually a barred spiral galaxy. Until 2005, we defined the Milky Way as a spiral galaxy.There are many different examples of galaxies that are spirals, including the Triangulum Galaxy, the Whirlpool Galaxy and the Pinwheel Galaxy.Unlike irregular galaxies, a spiral galaxy can usually be easily identified – this is made even easier with high powered equipment like the Hubble Space telescope. They’re named as such because of their swirling appearance, which means that they end up looking like a throwing ninja star. Spiral galaxies provide us with some of the best views in our night sky, and many of the most well known galaxies are actually spirals.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |