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Spiral galaxy - Wikipedia

en.wikipedia.org/wiki/Spiral_galaxy

A spiral galaxy is a type of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, forms part of the Hubble ...

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 ...

Spiral Galaxy Facts & Definition - Space.com

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.

Spiral Galaxy | NASA

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 ...

What is a spiral galaxy? | Cool Cosmos

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 ...

Hubble Spies the Barred Spiral Galaxy NGC 4394 | NASA

www.nasa.gov/image-feature/goddard/2016/hubble-spies-the-barred-spiral-galaxy-ngc-4394

May 6, 2016 ... Shown in this Hubble Space Telescope image, NGC 4394 is the archetypal barred spiral galaxy, with bright spiral arms emerging from the ends ...

Spiral Galaxies - Windows to the Universe

www.windows2universe.org/the_universe/Spirals.html

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 ...

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 ...

What process creates and maintains the beautiful spiral arms ...

www.scientificamerican.com/article/what-process-creates-and/

Before delving into an answer, it is important to note that the spiral arms of galaxies are not fixed, solid objects; rather, they are patterns of bright stars and gas ...

normal spiral galaxy | astronomy | Britannica.com

www.britannica.com/topic/normal-spiral-galaxy

Spirals are characterized by circular symmetry, a bright nucleus surrounded by a thin outer disk, and a superimposed spiral structure. They are divided into two ...