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- DictionarySpi·ral gal·ax·y/ˈspīrəl ˈɡaləksē/
noun
- 1. a galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms.
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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 galaxies that scientists have...
Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae[1] and, as such, form part of the Hubble sequence. Most spiral galaxies consist of a flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as the bulge.
Jul 12, 2024 · The meaning of SPIRAL GALAXY is a galaxy exhibiting a central nucleus or barred structure from which extend curved arms of higher luminosity —called also spiral nebula.
Jan 8, 2020 · Spiral galaxies are a class of galaxies originally described by astronomer Edwin Hubble in his 1936 work The Realm of the Nebulae. They are part of the Hubble sequence a morphological classification scheme for galaxies.
Apr 30, 2024 · What is a Spiral Galaxy? Spiral galaxies are one of the most common types of galaxies in the universe. They are characterized by their distinctive spiral arms that radiate out from a central bulge.
What is a spiral galaxy? Spiral galaxies get their name from the shape of their disks. In a spiral galaxy, the stars, gas and dust are gathered in spiral arms that spread outward from the galaxy's center.
Definition. A spiral galaxy is a type of galaxy characterized by its distinct spiral arms that wind outwards from the center, creating a flat, rotating disk. These galaxies often contain a mix of young and old stars, along with gas and dust, which contribute to star formation in the arms.
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Spiral galaxies—of which the Milky Way system is a characteristic example—tend to be flattened, roughly circular systems with their constituent stars strongly concentrated along spiral arms. These arms are thought to be produced by traveling density waves, which compress and expand the galactic material.
Mar 15, 2022 · What Is a Spiral Galaxy? A spiral galaxy typically has a rotating disc with spiral ‘arms’ that curve out from a dense central region. The Milky Way is a spiral galaxy.
