SBb galaxy
astronomy
Quick Summary
An SBb galaxy is a type of barred spiral galaxy, characterized by a bright nucleus, a disk, and spiral arms. In the Hubble classification scheme, barred spirals are designated "SB." The "b" in SBb indicates an intermediate type, with a medium-sized nucleus and arms that are more spread out and less smooth than those of an "Sa" galaxy. These arms contain stars, star clouds, and interstellar gas and dust. The Andromeda Galaxy is a well-known example of an Sb galaxy.2
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