You will be able to put the above concepts together to demonstrate your understanding of the rotation curve for NGC 3198. You will calculate both the total and luminous mass distributions of a galaxy,...You will be able to put the above concepts together to demonstrate your understanding of the rotation curve for NGC 3198. You will calculate both the total and luminous mass distributions of a galaxy, determine the percentage of luminous matter at different radii within the galaxy, and learn about how much of the galaxy is made up of dark matter.