Barred Spiral Galaxies

In barred spirals the spiral arms start not from the nucleus, but from the ends of a central straight bar. Studies show that this bar is rotating like a solid object, that is, with the same angular speed, but how is not yet well understood (Abell, p. 608).
Click on a thumbnail image to see it full size.

M90, NGC 4569

M91, NGC 4548

M95, NGC 3351

M109, NGC 3992

back to the top

Messier Catalog Home
Bruton's Home Page
Last updated on 11-02-99.