...Its visual movement, for all this time measurable onlyas a drift upon the amplified images of our instruments, now wasobvious... 
Raymond King Cummings 「Wandl the Invader」
...Itwas believed that light travelled instantaneously, but Roemer was ableto demonstrate the inaccuracy of this conclusion, and determined thatlight travels through space with a measurable velocity...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...We here reach some definitely measurable data for estimating itsvisible size...
Henry Warren 「Recreations in Astronomy」
...Independent of this, the stars themselves are all in motion, but sovast is the distance from which we observe them that it has takenan accumulation of centuries before they could be made measurable...
Henry Warren 「Recreations in Astronomy」
...Later he employed the same method with thecomets of 1577, 1580, 1582, 1585, 1590, 1593, and 1596, and proved that theytoo had no measurable parallax and must be very distant...
George Forbes 「History of Astronomy」
...The actual distances of certain celestial bodies being thusascertainable, it becomes a matter of no great difficulty to determinethe actual sizes of the measurable ones...
Cecil G. Dolmage 「Astronomy of To-day」
...It is hardly one-millionth part of the distance ofthe stars, and the displacement of the planet when viewed from the Capeand when viewed from Europe is a measurable quantity...
Robert Stawell Ball 「The Story of the Heavens」
...Welearned from it that light had a measurable velocity, which, accordingto recent researches, amounts to 186,300 miles per second...
Robert Stawell Ball 「The Story of the Heavens」
...This, then, isthe diameter of the visible and measurable part of the sun...
Henry Warren 「Recreations in Astronomy」
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