How can you differentiate between the three different types of galaxies?
1 Answer
Sep 5, 2017
This is an oblique response, but there used to be a superb website called Galaxy Zoo that taught me to do it.
Explanation:
Basically they are classified on visual characteristics alone - whether or not it shows spiral structure, if a bar is apparent etc.
It can be very difficult to judge if a Galaxy is side-on, but other clues (central bulge etc.) help.
