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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

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

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 ...

astronomy.swin.edu.au/cosmos/S/Spiral+Galaxy+Formation

Since our own galaxy is a spiral, most of our understanding of spiral galaxy formation comes from studies of the stellar populations within the Milky Way.

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.nasa.gov/image-feature/goddard/2018/hubble-catches-a-spiral-galaxy-in-disguise

May 18, 2018 ... Hubble Catches a Spiral Galaxy in Disguise. Bright white galaxy with a black bar along the centerline. Resembling a wizard's staff set aglow, ...

www.softschools.com/facts/space/spiral_galaxy_facts/438

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  ...