Elements of astronomy ... with explanatory notes, and questions for examination (1855)
Brocklesby, John, 1811-1889 · New York, Farmer, Brace & co. · leaf 121
wn from one extremity of 1. Periodic time is the time occupied by a planet in performing onerevolution about the sun. Thus, one year is the periodic time of the earth. 2. A cube is the quantity resulting from multiplying a quantity into itselftwice ; thus 8 is the cube of 2 because 2x2x2 equals 8.… … CIRCLE WITH TRIANGLES. each arc perpendicular to the diameter MB, passing throughthe other extremity, making with portions of this diameterand the several radii, CX; CX1; CX2, &c., a seriesof right angled triangles; viz., CXI, CX1!1, CX2I2, &c.Giving next some particular value to the radius…
Astronomy
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