Newcomb, Simon, 1835-1909 · New York, Harper & brothers · leaf 363
, therefore, represented by thirteen or fourteen orders of magnitude. From this, it would follow that Mars gives from 200,000 to 500,000 times a* much light as the satellite ; and if both are of the same light-reflecting power, the diameter of the satellite would be from 6 to 10 miles. It may be as… … Fiu. s)5a.— Apparent orbits of the satellites of Mars in lS77,as observed and laid down by Professor Hall. § 7. The Small Planets. It was impossible to study the solar system, as it was known to modern astronomy before the beginning of the present cen- tury, without being struck by the great gap…
Astronomy
Internet Archive · Wellesley College Library · Public domain (published before 1931). Free to use for anything.
