noun. A galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms. ‘The new Whirlpool Galaxy image shows the spiral galaxy's classic features, from its curving arms, where newborn stars reside, to its yellowish central core that serves as home for older stars.’. ‘Four years ago astronomers reported that

Spiral galaxy definition: a galaxy consisting of an ellipsoidal nucleus of old stars from opposite sides of which... | Meaning, pronunciation, translations and examples

Jan 03, 2019 Spiral galaxies are a type of galaxy that was discovered by Edwin Hubble first in 1936 based on their appearance in optical light. A spiral galaxy is a pinwheel shape and mostly consists of a flat, rotating disk containing stars, gas, and dust. The central point in the galaxy, known as the bulge, is a large cluster of stars and is also thought

Dec 05, 2020 Spiral Galaxy Definition : Spiral galaxies are named by their spiral structures that stretch from the middle into the galactic disc. The spiral arms are sites of ongoing star formation and are brighter than the encircling disc due to the young, hot OB stars that inhabit them

Barred spiral galaxy definition, a spiral galaxy whose center has the form of an extended bar. See more

Definition of barred spiral galaxy in the Definitions.net dictionary. Meaning of barred spiral galaxy. What does barred spiral galaxy mean? Information and translations of barred spiral galaxy in the most comprehensive dictionary definitions resource on the web

Dec 16, 2011 Spiral Galaxy. Resembling festive lights on a holiday wreath, this NASA/ESA Hubble Space Telescope image of the nearby spiral galaxy M74 is an iconic reminder of the impending season. Bright knots of glowing gas light up the spiral arms, indicating a rich environment of star formation. Messier 74, also called NGC 628, is a stunning example of a

Oct 31, 2021 The meaning of elliptical galaxy is a galaxy that has a generally elliptical shape and that has no apparent internal structure or spiral arms —called also elliptical

Spiral galaxies have centers with bands or arms coming out from the center in a spiral formation, which explains their name. Let's take that imaginary space ship to a spiral galaxy now

Spiral galaxy Definition from Encyclopedia Dictionaries & Glossaries. Wikipedia Dictionaries. English Wikipedia - The Free Encyclopedia. A spiral galaxy is a certain kind of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, forms part of the Hubble sequence. Spiral galaxies consist of a flat

A galaxy with poorly defined arms is sometimes referred to as a flocculent spiral galaxy; in contrast to the grand design spiral galaxy that has prominent and well-defined spiral arms. The speed in which a galaxy rotates is thought to correlate with the flatness of the disc as some spiral galaxies have thick bulges, while others are thin and dense

Jan 08, 2020 The most common type of galaxy found throughout the universe is the spiral galaxy. Around 77% of the galaxies observed by man are spiral galaxies. A good example of this type is the Andromeda galaxy. Around two-thirds of all spiral galaxies have a bar-like structure – thus they are classified as barred spiral galaxies

Sep 20, 2021 Definition of spiral galaxy. : a galaxy exhibiting a central nucleus or barred structure from which extend curved arms of higher luminosity. — called also spiral nebula

a galaxy consisting of an ellipsoidal nucleus of old stars from opposite sides of which arms, containing younger stars, spiral outwards around the nucleus. In a barred spiral the arms

spiral galaxy. n. (Astronomy) a galaxy consisting of an ellipsoidal nucleus of old stars from opposite sides of which arms, containing younger stars, spiral outwards around the nucleus. In a barred spiral, the arms originate at the ends of a bar-shaped nucleus

In a spiral galaxy, the stars, gas and dust are gathered in spiral arms that spread outward from the galaxy's center. Spiral galaxys are divided into three main types depending on how tightly wound their spiral arms are: Sa, Sb and Sc. Sa galaxies have very tightly wound arms

Nov 19, 2018 Spiral galaxies are twisted collections of stars and gas that often have beautiful shapes and are made up of hot young stars. Most of the

Lesson Summary. A spiral galaxy is a galaxy that is shaped like a spiral, with a bulge in the center. Our Milky Way galaxy is a barred spiral galaxy, which means it has a bright line going through