This is the most famous of the two clusters because it has a compact core of galaxies scattered across two degrees of the sky which makes it a popular
target for amateur astronomers.
«Dymock, an accomplished optical observer, asteroids offer the
opportunity for amateur astronomers to enjoy challenging celestial targets and to augment the scientific research of professional astronomers.
The Astronomical Society of the Pacific (ASP) is an organization of both professional and amateur astronomers that has developed a strong outreach and education
program for amateur astronomers and the public.
And consider the difference a little green marker can
make for an amateur astronomer or environmentalist, a high school student working on a science fair project, a Wikipedian struggling to build the best researched entry she can in Wikipedia, and then the reader who follows her links to learn more about the topic.