![]() Irregular Galaxies are categorized by their lack of structure. Our Sun is just one of a vast number of stars within a. Also known as M51, it highlights the attributes of a typical spiral galaxy, including graceful, curving arms, pink star-forming regions, and brilliant blue strands of star clusters. The sometimes show some bar structure, and sometimes show a pronounced active region of star formation. The Whirlpool Galaxy is a spiral galaxy located 31 million light-years away. M81 is one of the brightest galaxies seen from Earth. Irregular Galaxies often do not contain enough structural material to be characterized as Spirals or Ellipticals. Bode’s Galaxy, also known as Messier 81 (M81), is a grand design spiral galaxy located in the constellation Ursa Major. ![]() These bulges are often surrounded by a faint halo of stars, many of which reside in globular clusters a spherical collection of stars that orbits a galactic core. Irregular Galaxies are, you guessed it, irregular in shape. Spiral galaxies usually consist of a rotating disk that contains stars, dust, gas, and a concentration of stars known as the bulge in the center. ![]() Astronomers believe that every Elliptical Galaxy contains a supermassive black hole located centrally in the Galaxy related to the mass of the Galaxy itself. Most Elliptical Galaxies have old, low-mass stars and lack star-making gas and dust clouds to form new stars at an efficient rate. Large numbers of Spirals have an aura of stars and star clusters above and below the galactic bulge.īarred Spiral Galaxies have a long, bar-shaped presence of stars and material in the central region of the Galaxy instead of a disc.Įlliptical Galaxies slightly resemble the shape of an egg (ellipsoidal or ovoid) and are most commonly found in galaxy clusters and smaller compact groups. The bright central region of the Galaxy is called the "galactic bulge". Spirals Galaxies are massive rotating disks of stars and nebulae, completely surrounded by dark matter. Our Galaxy, the Milky Way is, in fact, a Spiral Galaxy as well as the rather close Galaxy, Andromeda. The most common type of galaxy in our universe is the Spiral Galaxy.
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