A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 351
the same reflectivepower as that of the planet, Professor Pickering has estimated thediameter of Phobos, which is the larger one, as about seven miles,and that of Deimos, as five or six. The light given by Phobos tothe inhabitants of Mars would be about g^ of our moonlight; thatof Deimos about… … Fig. 177. — Orbits of the Satellites of Mars. ity of revolution raises important questions as to the theory of thedevelopment of the solar system, and requires modification of theviews which had been held up to the time of their discovery. Ifthe nebular hypothesis is true, a shortening of the…
Astronomy
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