A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 398
allow for its effect. But a new difficulty appeared, from whichthere seems to be absolutely no way of escape, — the planets atmospherecauses it to be surrounded by a luminous ring as it enters upon the sunsdisc, and thus renders the time of the contact uncertain by at least fiveor six seconds. In…
Astronomy
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