NGC 2903 is a field barred spiral galaxy about 20 million light-years away in the constellation Leo.
Just a little smaller than our own Milky Way, NGC 2903 is about 80,000 light-years across. NGC 2903 has a central bar with very young, hot globular clusters along it. Furthermore, the galaxy possesses massive blue spiral arms laced with dark dust lanes, immense gas and dust clouds, and an unusual mix of old and young star clusters, in contrast to the uniformly old globular clusters found in our Milky Way galaxy. However, its general size and central bar makes it quite similar to our Milky Way.
I took this image over 13 hours. Luminance 15 images of 1400 seconds each, Red & Green 7 images of 15 minutes each, Blue 10 images of 10 minutes each.