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William Herschel
innbundet,
2021,
Engelsk,
ISBN 9783754397374
Observing and Cataloguing Nebulae and Star Clusters
innbundet,
2010,
Engelsk,
ISBN 9780521192675
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 …