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Observing and Cataloguing Nebulae and Star Clusters
e-bok,
2010,
Engelsk,
ISBN 9780511784354
The New General Catalogue (NCG), originally created in 1888, is the source for referencing bright nebulae and star clusters, both in professional and amateur astronomy. With 7840 …
Galaxies and How to Observe Them
e-bok,
2007,
Engelsk,
ISBN 9781846286995
Galaxies are perhaps the most popular of all visual targets that are sought after by visual observers. At present the only way to get up-to-date information, is to query various …