Galaxy M33 Revisited

This face-on spiral galaxy is the third-largest member of the Local Group, after M31 and our own Milky Way.

The red regions are glowing clouds of ionized hydrogen, often indicative of star-forming areas in the spiral arms.

This is a revisit of a target originally imaged in 2018 (see below). The new imaging run went deeper by increasing total exposure times and using techniques in PixInsight to bring out the spiral arms and the dark structures.

Exposure times were 12 hours each through LRGB filters and 18 hours H-α.

North is to the upper left in this image.

Planewave CDK-14, FLI Proline P9000 camera and Astrodon filters.

Galaxy M33 (2018 image)

This face-on spiral galaxy is the third-largest member of the Local Group, after M31 and our own Milky Way.

The red regions are glowing clouds of ionized hydrogen, often indicative of star-forming areas in the spiral arms.

North is toward the left in this image.

Planewave CDK-14, FLI Proline P9000 camera and Astrodon filters.