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Spiral galaxy - Wikipedia


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 ...

Spiral Galaxies - SDSS


The most common type of galaxy is called a "spiral galaxy." Not surprisingly, spiral galaxies look like spirals, with long arms winding toward a bright bulge at the ...

What is a spiral galaxy? | Cool Cosmos


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 ...

Spiral Galaxy | COSMOS

astronomy.swin.edu.au/cosmos/S/spiral galaxy

When Hubble developed his classification system for galaxies based on their appearance in optical light, he divided the spirals into those in which the spiral arm ...

Galaxies - Astronomy Notes


Jun 2, 2007 ... Spiral galaxies have flattened disks with a spiral pattern in the disk. The spiral arms can go all of the way into the bulge or be attached to the ...

Spiral and Elliptical Galaxies - damtp


The classification of galaxies due to Hubble (1925) remains the most popular in use today. There are two main categories, the spiral and elliptical galaxies, but ...

Classification of Galaxies


Apr 18, 2000 ... There are three main types of galaxies: Elliptical, Spiral, and Irregular. Two of these three types are further divided and classified into a system ...

National Optical Astronomy Observatory: Spiral Galaxies


Sep 2, 2015 ... Spiral galaxies are rotating disk systems of stars, gas and dust. ... Spirals are classified based on the tightness of their arms the size and shape ...

Spiral Galaxy Facts - SoftSchools


Spiral galaxies get their name by the fact that they have a spiral or whirl shape. The "arms" of the spiral are the areas where stars are formed. These arms appear  ...

Galaxies, Galaxy Information, Galaxy Facts, News, Photos ... - Science


A composite image of the Messier 81 (M81) galaxy shows what astronomers call a "grand design" spiral galaxy, where each of its arms curls all the way down ...

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Spiral Galaxy Facts & Definition - Space.com


Aug 15, 2013 ... A spiral galaxy has a distinct winding shape. Most of the galaxies observed by astronomers are spiral galaxies.

Spiral Galaxy | NASA


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 ...

Spiral Galaxies - Windows to the Universe


Spiral galaxies may remind you of a pinwheel. They are rotating disks of mostly hydrogen gas, dust and stars. Through a telescope or binoculars, the bright ...