A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 335
in the amount of heat and light which they receivefrom the sun, and in the force of gravity upon their surfaces, andprobably In the density of their atmospheres, are such as to bar anypositive conclusions as to their being the abode of life resembling theforms of life with which we are acquainted… … FlG. 170. — Kelative Sizes of the Planets. out, present to us only a surface of cloud, and may not haveanything solid about them. There are some reasons for suspectingthat they are at a high temperature ; in fact, that Jupiter is a sort ofsemi-sun; but this is by no means yet certain. As for the…
Astronomy
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