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1. en.wikipedia.org › wiki › Spiral_galaxySpiral galaxy - Wikipedia

   en.wikipedia.org › wiki › Spiral_galaxy

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   There are many lines of evidence for the existence of black holes in spiral galaxy centers, including the presence of active nuclei in some spiral galaxies, and dynamical measurements that find large compact central masses in galaxies such as Messier 106.

2. Videos

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     What Is a Spiral Galaxy?

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     Types of Galaxies in the Universe

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     Types of Galaxies in Space - Spiral, Elliptical, Irregular plus more

     2 Apr 2022

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3. en.wikipedia.org › wiki › List_of_spiral_galaxiesList of spiral galaxies - Wikipedia

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   Spiral galaxies. Below is a list of notable spiral galaxies with their own articles. The classification column refers to the galaxy morphological classification used by astronomers to describe galaxy structure. Designation. Picture. Classification. Constellation. Apparent Magnitude. Comet Galaxy.

   Designation	Picture	Classification	Constellation
   Comet Galaxy	S	Sculptor	18.7
   ESO 97-G13, Circinus Galaxy	S	Circinus	11
   ESO 510-G13	Sa: pec sp	Hydra	13.4
   IC 342	SAB (rs)cd	Camelopardalis	9.1

   See full list on en.wikipedia.org

4. www.space.com › 22382-spiral-galaxySpiral Galaxy Facts & Definition | Space

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   Nov 19, 2018 · One of the largest known spiral galaxies is NGC 6872, which is 522,000 light-years across from the tips of its outstretched spiral arms — that's about 5 times the size of the Milky Way.

5. www.nasa.gov › universe › galaxiesSpiral Galaxies - NASA

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   Spiral Galaxies - NASA. NASA Selects Crew for 45-Day Simulated Mars Mission in Houston. Amendment 62: New Opportunity: A.61 INSPYRE Science Team. Amendment 17: B.5 Living With a Star Science: Several Small Updates. Amendment 59: A.12 Ocean Surface Topography Science Team Proposal Due Date Delay to October 31, 2024.

6. nineplanets.org › spiral-galaxiesSpiral Galaxies | Facts, Information, History & Definition

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   Jan 8, 2020 · There are currently 3 classifications of classical spiral galaxies and another 3 for barred spiral galaxies: 1. Spiral galaxy type A – abbreviation Sa – they have a big central bulge and smooth, broad spiral arms. Around 2% of the mass of Sa spiral galaxies is present in the form of gas and dust.

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7. science.nasa.gov › universe › galaxiesGalaxy Types - Science@NASA

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   Types of Galaxies Scientists sometimes categorize galaxies based on their shapes and physical features. Other classifications organize galaxies by the activity in their central regions – powered by a supersized black hole – and the angle at which we view them. Spiral Galaxies Our Milky Way is one example of a broad class of galaxies […]

8. People also ask

   How many types of spiral galaxies are there?

   • There are currently 3 classifications of classical spiral galaxies and another 3 for barred spiral galaxies: 1. Spiral galaxy type A – abbreviation Sa – they have a big central bulge and smooth, broad spiral arms. Around 2% of the mass of Sa spiral galaxies is present in the form of gas and dust.

   Spiral Galaxies | Facts, Information, History & Definition

   nineplanets.org/spiral-galaxies/

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   Is the Milky Way a spiral galaxy?

   • The Milky Way – the galaxy that includes Earth and our solar system – is an example of a spiral galaxy. Spiral galaxies make up roughly 72 percent of the galaxies that scientists have observed, according to a 2010 Hubble Space Telescope survey. Most spiral galaxies contain a central bulge surrounded by a flat, rotating disk of stars.

   Spiral Galaxy Facts & Definition | Space

   www.space.com/22382-spiral-galaxy.html

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   How many spiral galaxies have a bar-like structure?

   • Around two-thirds of all spiral galaxies have an additional component in the form of a bar-like structure. This bar extends from the central bulge at the ends of which spiral arms begin. Our Milky Way, for example, is a barred spiral galaxy. Spiral galaxies are the most common type of galaxies found throughout the Universe.

   Spiral Galaxies | Facts, Information, History & Definition

   nineplanets.org/spiral-galaxies/

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   How many galaxies are in the Milky Way galaxy?

   • Our solar system resides in the Milky Way galaxy, a spiral galaxy that is part of a group of galaxies called the Local Group. There are billions of galaxies in the Universe, but only three outside our Milky Way Galaxy can be seen without a telescope - the Large and Small Magellanic Clouds and the Andromeda galaxy.

   Reference

   imagine.gsfc.nasa.gov/science/objects/galaxies1.html

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   How many types of galaxies are there?

   • There are three general types: elliptical, spiral, and irregular. Perhaps the most familiar kind of galaxy are spiral galaxies. They have a distinctive shape with spiral arms in a relatively flat disk and a central "bulge". The bulge has a large concentration of stars. The arms and bulge are surrounded by a faint halo of stars.

   Reference

   imagine.gsfc.nasa.gov/science/objects/galaxies1.html

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   What is a spiral galaxy?

   • A spiral galaxy is a type of galaxy characterized by a central bulge of old Population II stars surrounded by a rotating disc of younger Population I stars. A spiral galaxy maintains its spiral arms due to density wave theory. Below is a list of notable spiral galaxies with their own articles.

   List of spiral galaxies - Wikipedia

   en.wikipedia.org/wiki/List_of_spiral_galaxies

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9. imagine.gsfc.nasa.gov › science › objectsGalaxies - Imagine the Universe!

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   Sep 23, 2021 · There are billions of galaxies in the Universe, but only three outside our Milky Way Galaxy can be seen without a telescope - the Large and Small Magellanic Clouds and the Andromeda galaxy. The Large and Small Magellanic Clouds are about 160,000 light years away and are satellites of the Milky Way. They can be seen from the southern hemisphere.