What Are Barred Spiral Galaxies?

What is a barred spiral galaxy and how are they different from elliptical and normal spiral galaxies?
Barred spiral galaxies share common features with normal spiral galaxies. They have a disc like structure with spiral arms, similar gas content and star formation. However, they have a bar like structure which extends from the central bulge to the spirals. The bar funnels gas towards the central bulge and black hole. This causes the central bulge in bar galaxies to undergo star formation, which does not occur in the classical spherical bulge due to a lack of gas.

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Interesting. I like barred spiral galaxies and was happy to learn that we live in one.