The Amateur Telescopist's Handbook

4th mag Aldebaran amateur Androm Antares aperture astronomical beautiful double Betelgeuse bluish brilliant Cassiopeæ Catalogue celestial objects centre circles color constellation crater Crown 8vo Cygni diameter disk distance distant companion double star equatorially mounted eyepiece field finder flushed white focal length focus Fomalhaut fourth-mag globular cluster H VII Herschel inches instrument last object lens lenses light lilac Line from Polaris Line from ẞ line to ẞ magnifying magnitude Mare Serenitatis Mean R. A. meridian minute stars moon mounted naked eye neat double nebula object glass observer orange Orionis pair pale white pale yellow planet planetary nebula polar axis Polaris pretty double Proctor Procyon red star rich cluster Rigel right ascension satellites Sir Howard Grubb Sirius small telescope Smyth splendid star of mag tele third-mag tint topaz topaz yellow triple tube visible Webb wide double Woodcuts yellowish