Stars and telescopes; a hand-book of popular astronomy founded on the 9th ed. of Lynn's Celestial motions (1901)
Todd, David P. (David Peck), 1855-1939, Lynn, William Thynne, 1835-1911 · Boston, Little, Brown · leaf 96
SUN — SPECTROHELIOGRAM BY DESL4NDRES {Photographed by the brilliant K lineattributed to calcium) SOLAR CHROMOSPHERE— DESLANDRES ( The protuberances rise to a height 0/about30,000 miles) … SEPT. 8, IO A. M. SEPT. g, 3 P.M. SEPT. 10, II A. M. GREAT GROUP OF SPOTS ON THE SUN IN 1S98 (From photographs at the Royal Observatory, Greenwich. The Suns diameter on the samescale is about 9 inches. The largest spot is about 35,000 miles long) The Sun 65 by Airy, then Astronomer Royal, and by…
Astronomy
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
