m51 whirlpool galaxy real photo

5194 51a alpha amazing astro astronomy astrophotography background bang big black blackhole camera canes ccd celestial cluster comet constellation cosmos creation cygnus dark dust galactic galaxy hot hydrogen image known m51 m51a messier milky moon narrowband nature nebula ngc oxygen photo photography planetarium planetary science sky space spiral star stellar super supernova telescope the universe venatici way whirlpool