About Spiral Galaxies
"Eighty percent of the galaxies in the universe can be classified as spiral galaxies. The distinguishing characteristics of spiral galaxies are the appearance of ""arms"" that seem to spiral around a central bulge of stars and dust--hence the name. The"... More »
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en.wikipedia.org/wiki/Spiral_galaxy

Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, form part of the Hubble ...

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

Nov 19, 2018 ... A description of spiral galaxies, a family of galaxies that includes Earth's own Milky Way.

cas.sdss.org/dr6/en/proj/basic/galaxies/spirals.asp

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 ...

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 ...

coolcosmos.ipac.caltech.edu/ask/217-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 ...

www.nasa.gov/multimedia/imagegallery/image_feature_2132.html

Dec 16, 2011 ... Resembling festive lights on a holiday wreath, this NASA/ESA Hubble Space Telescope image of the nearby spiral galaxy M74 is an iconic ...

www.spacetelescope.org/images/potw1247a

The NASA/ESA Hubble Space Telescope has spotted the spiral galaxy ESO 499- G37, seen here against a backdrop of distant galaxies, scattered with nearby ...

space-facts.com/galaxy-types

Spiral galaxies are the most common type in the universe. Our Milky Way is a spiral, as is the rather close-by Andromeda Galaxy. Spirals are large rotating disks ...

www.britannica.com/science/spiral-galaxy

Spiral galaxy: galaxy: Spiral galaxies: Spirals are characterized by circular symmetry, a bright nucleus surrounded by a thin outer disk, and a superimposed  ...