Stars and telescopes; a hand-book of popular astronomy, founded on the 9th ed. of Lynn's Celestial motions (1899)
Todd, David P. (David Peck), 1855-1939, Lynn, William Thynne, 1835-1911. Celestial motions · Boston, Little, Brown and company · leaf 311
252 Stars and Telescopes original solar nebula is embraced in the Sun, whichhas 750 times the mass of all the attendant planetsand satellites com-bined. Our system isessentially single — allthe mass in the Sun— while in binary starsthe systems are essen-tially double. Applying the law ofbinary…
Astronomy
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