Answer to Question #54986 in Astronomy | Astrophysics for ashok

Question #54986
Distinguish between spiral and barred spiral galaxies giving examples of each type of
galaxy.
1
Expert's answer
2015-10-01T00:00:45-0400
Some spiral galaxies have arms that are wound tightly, while other galaxies have very loosely-wound arms. The difference between tightly and loosely wound spirals is a genuine difference between the galaxies, and can be used to classify spirals.
About 77% of the observed galaxies in the universe are spiral galaxies. Our own galaxy, the Milky Way, is a typical spiral galaxy. The images below show three other good examples.

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