Astronomy with an opera-glass: a popular introduction to the study of the starry heavens with the simplest of optical instruments, with maps and directions to facilitate the recognition of the constellations and the principal stars visible to the naked eye; (1888)
Serviss, Garrett Putman, 1851-1929 · New York, London, D. Appleton and company · leaf 95
some respects the most wonderful andinteresting in all the heavens. It is as famous for the varia-bility <of its light as Mira, but it differs widely from that starboth in its period, which is very short, and in the extent ofthe changes it undergoes. During about two days and a 84 ASTRONOMY WITH… … The Attendants of Alpha Persei. tude, being then about equal to the faint stars near it. Itremains thus obscured for only a few minutes, and then be-gins to brighten again, and in about four and a half hoursmore resumes its former brilliance. This phenomenon is veryeasily observed, for, as will be…
Astronomy
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