arXiv : "A Zoo of Galaxies" by Karen L. Masters
" A Zoo of Galaxies " by Karen L. Masters is a good place to start for an amateur astronomer interested in contributing to astronomy. The author discusses the Morphology of Galaxies and human efforts over the last couple of decades in classifying the galaxies. Our understanding of the universe and our milky way galaxy in general have changed over the last couple of decades - from thinking that earth was the center of the universe to understanding that the earth revolves around the sun, - from thinking that sun was the center of the galaxy to realizing that the sun was ~8 kpc away from the center of the milkyway galaxy and - from thinking that the bright objects and halos visible in the night sky belong to our galaxy to understanding that the our galaxy is just one of the many galaxies visible in the night sky, that galaxies interact with each other, move in clusters, collide with each other, and it's all for us to see, understand and observe in awe. On the journey