Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 386
the wonderful star). It is generallyinvisible to the naked eye ; but at intervals of about elevenmonths it shines forth as a star of the second or thirdmagnitude. It is about forty days from the time it becomesvisible until it attains its greatest brightness, and is thenabout two months in fading… … 360 ASTRONOMY. with certainty. Its maximum brightness is also variable,being sometimes of the second magnitude, and at othersonly of the third or fourth. 355. Eta Argus. — Perhaps the most extraordinary varia-ble star in the heavens is Eta Argus, in the constellationArga, or the Ship, in the…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
