Galaxy Groups and Clusters Observing Guide
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"Robert: I have a copy of your book entitled "Galaxy Groups and Clusters" and I think it is EXCELLENT, both you and Mr. Miles Paul are to be congratulated! This is a most useful reference for any observer - visual, CCD or astrophotographer. I really believe that this book will become an instant classic for deep-sky galaxy enthusiasts. I have one copy in my library and one copy in my observatory, near my telescope."
Sonoran Desert Observatory
Ronald J. Morales
Challenge your observing skills with this new observing guide of 99 Hickson DSS images and Megastar charts. Megastar charts guide you through the universe for these deep sky objects: 50 galaxy trios, 50 galaxy groups and 50 Abell clusters.
This program of 250 galaxy groups and clusters is designed for detailed visual and/or CCD observation. For many, the challenge will be to see these galaxy clusters with their own eyes. Many of the galaxy groups and clusters in this observing program are visually accessible with a 12.5-14" telescope under dark skies.
Since the advent of the charge coupled device (CCD), visual and photographic observing techniques have been surpassed by the CCD’s ability to record faint objects. While a CCD camera with an 8" or larger scope will be helpful for many of the fainter groups and clusters, you don’t need a CCD camera to complete the program. However some of the more distant, fainter clusters will be a severe challenge for visual observers. This observing guide will assist you in hunting dim clusters and perhaps experiencing the thrill of discovery that George Abell and others felt in the past when discovering these distant groups.
The required written descriptions may be supplemented by CCD images, pencil drawings, or a combination of both. Each method has its own advantages and disadvantages. CCD imaging is capable of greater detail and higher resolution than an experienced visual astronomer can produce. One drawback is the complicated and expensive equipment. On the other hand, sketching is a technique that requires practice, a steady hand and a skilled observer at the eyepiece. Accurately sketching a field of galaxies will generally lead to more careful observation, since one naturally tends to see more detail in an object when trying to draw it.
Copyright 2006