 | John Gummere - Astronomy - 1842 - 516 pages
...times EC, the moon's distance from the earth. 226. Semi-diameter of the earth's shadow. The apparent semi-diameter of the earth's shadow, at the distance of the moon is called the semi-diameter of the shadow. Thus, the angle bEc is the semi-diameter of the shadow. The... | |
 | Benjamin Peirce - Plane trigonometry - 1845 - 498 pages
...Problem. To find when a lunar eclipse will happen. Solution. The solution is the same as in § 1 68, except that the semidiameter of the earth's shadow...see it. Now if S (fig. 63) is the sun, E the earth, GF the semidiameter of the sun's shadow at the moon, we have the app. semi. = FEG = EFL — EIF = P... | |
 | Horatio Nelson Robinson - Astronomy - 1850 - 378 pages
...of the equation, and transpose the angle SEp, we then have mEP=P-^-p — SEp. But the angle, mEp, is the semidiameter of the earth's shadow at the distance of the moon; SEp is the semidiameter of the sun; P, that is, the angle EPp, is the moon's horizontal parallax ;... | |
 | John Gummere, Ezra Otis Kendall - Astronomy - 1854 - 484 pages
...times EC?, the moon's distance from the earth. 226. Semi-diameter of the earths shadow. The apparent semidiameter of the earth's shadow, at the distance of the moon, is called the semi-diameter of the shadow. Thus, the angle £Ec? is the semi-diameter of the shadow. The... | |
 | Elias Loomis - Astronomy - 1866 - 384 pages
...almost three times the moon's diameter. Let M'M" represent a portion of the moon's orbit. The apparent semi-diameter of the earth's shadow at the distance of the moon is the angle MEH. ButEHD=FEH+HFE. Hence MEH = EHD — HFE. But EHD = the moon's horizontal parallax ;... | |
 | Elias Loomis - Astronomy - 1870 - 398 pages
...almost three times the moon's diameter. Let M'M" represent a portion of the moon's orbit. The apparent semi-diameter of the earth's shadow at the distance of the moon is the angle MEH. ButEHD=FEH+HFE. Hence MEH =EHD— HFE. But EHD= the moon's horizontal parallax; and... | |
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The apparent semi-diameter of the earth's shadow at the distance of the moon is the angle MEH. 