Unbarred spiral galaxy
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An unbarred spiral galaxy is a type of spiral galaxy without a central bar, or one that is not a barred spiral galaxy. It is designated with an SA in the galaxy morphological classification scheme. A
The Whirlpool Galaxy and its companion satellite. The Whirlpool is an unbarred spiral galaxy.
Under the de Vaucouleurs classification system, SA galaxies are one of three types of spiral galaxy.
An example of this type, imaged by the Hubble Space Telescope
Ngc 3593
Magellanic spiral
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A Magellanic spiral galaxy is a spiral galaxy with only one spiral arm. Magellanic spiral galaxies are classified as the type Sm ; the prototype galaxy and namesake for Magellanic spirals is the Large
Ngc 5204 hst 555 R814GB606
Merging galaxies NGC 4676
NGC 4236 I FUV g 2006
The Large Magellanic Cloud revealed by VISTA