WebApr 27, 2010 · Astronomers recognize two main galaxy types: elliptical and spiral. These differences in shape, according to one theory, are due to star formation. Stars develop … WebJul 13, 2024 · It’s a small part of the Milky Way Galaxy. A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle. When you look up at stars in the night sky, you’re seeing other stars in the Milky Way.
How Do Galaxies Form? Live Science Forums
WebThese proto-galactic structures then interact and merge into larger structures now known as galaxies. Present-day galaxies typically have masses of 10 11 solar masses so must have undergone numerous … WebFeb 22, 2024 · Robert Harrison. A: Spiral arms in galaxies can form by a combination of processes. In a spiral galaxy, everything orbits at the same speed, meaning stars and gas near the center of the galaxy ... small donations gift aid limit
Formation and evolution of galaxies (article) Khan Academy
WebThe youngest stars form in gas-rich arms, while older stars can be found throughout the disk and within the bulge and halo. Both the Milky Way and the Andromeda galaxies belong to a subtype known as barred spirals, which make up two-thirds of the group. Barred spirals sport ribbons of stars, gas, and dust that cut across their centers. Some astronomers believe that ring galaxies are formed when a smaller galaxy passes through the center of a larger galaxy. Because most of a galaxy consists of empty space, this "collision" rarely results in any actual collisions between stars. See more A ring galaxy is a galaxy with a circle-like appearance. Hoag's Object, discovered by Art Hoag in 1950, is an example of a ring galaxy. The ring contains many massive, relatively young blue stars, which are extremely bright. … See more Ring galaxies are theorized to be formed through various methods including, but not limited to, the following scenarios: Bar instability A phenomenon where the rotational velocity of the bar in a barred spiral galaxy increases to the … See more • Hoag's Object at Astronomy Picture of the Day. See more • Vela ring galaxy, and a bright star known as HD 88170. • Ring Galaxy - Zw II 28 See more • List of ring galaxies • Interacting galaxy – Galaxies with interacting gravitational fields • Hoag's object – Unusual galaxy in the constellation Serpens See more WebSep 2, 2024 · Some part of galaxies are shaped like a doughnut, the so-called ring galaxies [3, 4], and may contain a hole in the middle, e.g., see the recently found giant ring galaxy (ID 5519) . In fact, more than a half of disk galaxies have ring structures of different scales which may also have an irregular form . A large amount of the ring galaxies are ... song arts academy