Galaxies for Classification

Each galaxy has two images: a color (g,r,i) SDSS image with a stretch that allows a very wide dynamic range to be visible; and a high quality (large plate-scale) blue photographic plate, with much narrower dynamic range. Historically, most galaxy classification has been done using blue photographic plates.

Since the SDSS colors are quite accurate, the left hand images provide a good opportunity to become familiar with the range of colors exhibited by galaxies, as well as how different parts of a galaxy (bulge, nucleus, arms, dust lanes, etc) have different colors.

Galaxy 1: SDSS	Galaxy 1: Blue
Galaxy 2: SDSS	Galaxy 2: Blue (central region)
Galaxy 3: SDSS	Galaxy 3: Blue
Galaxy 4: SDSS	Galaxy 4: Blue
Galaxy 5: SDSS	Galaxy 5: Blue
Galaxy 6: SDSS	Galaxy 6: Blue
Galaxy 7: SDSS	Galaxy 7: Blue
Galaxy 8: SDSS	Galaxy 8: Blue
Galaxy 9: SDSS	Galaxy 9: Blue
Galaxy 10: SDSS	Galaxy 10: Blue
Galaxy 11: SDSS	Galaxy 11: Blue
Galaxy 12: SDSS	Galaxy 12: Blue
Galaxy 13: SDSS	Galaxy 13: Blue
Galaxy 14: SDSS	Galaxy 14: Blue