 | Jedidiah Morse - 1814 - 696 σελίδες
...when a line, drawn from the centre of the body to the centre of the earth, makes a right ' angle -with a line, drawn from the centre of the earth to the centre of the stm. Elongation. The greatest elongation of a heavenly body is its greatest apparent distance from... | |
 | William Frend - 1818 - 250 σελίδες
...line drawn from any point of them to the Earth would be nearly in the same direction. If we suppose a line drawn from the centre of the Earth to the centre of the disc, then whatever angle it makes with the plane at that point, the same angle would the line make... | |
 | WILLIAM FREND - 1818 - 228 σελίδες
...line drawn from any point of them to the Earth would be nearly in the same direction. If we suppose a line drawn from the centre of the Earth to the centre of the disc, then whatever ang'e it makes with the plane at that point, the same angle would tiie line make... | |
 | John Mason Good - 1819 - 742 σελίδες
...To comprehend and separate these, let us resort to some fixed terms. Conceive that a visual ray is drawn from the centre of the earth to the centre of the moon : the plane drawn through the latterce litre perpendicularly to this ray will cut the lunar globe... | |
 | Sidney Edwards Morse - 1822 - 706 σελίδες
...when a line drawn from the centre of the body to the centre of the earth, makes a right angle with a line, drawn from the centre of the earth to the centre of the sun. Elongation. The greatest elongation of a heavenly body is its greatest apparent distance from the sun.... | |
 | John Farrar - 1827 - 464 σελίδες
...that, in these general views we may regard them as absolutely parallel. Then, if we suppose a straight line drawn from the centre of the earth to the centre of the sun, the plane perpendicular to this line, will separate the illuminated part of the earth's surface from... | |
 | John Farrar - 1827 - 456 σελίδες
...To analyze these illusions, we must make use of precise language. Let us then suppose a visual ray drawn from the centre of the earth to the centre of the moon. A plane drawn through this latter centre perpendicular to the above ray, cutting the globe of... | |
 | Siméon-Denis Poisson - 1842 - 770 σελίδες
...respective primary planets. The moon presents always the same face to the earth, so that the radius vector drawn from the centre of the earth to the centre of the moon, meets the surface of the satellite always in the same point (No. 141)(a) ; hence it follows,... | |
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IJandnotwith any special problem. course, that most astronomers mean by 'the universe' the sphere of which the centre is the centre of the earth and the radius is a line drawn from the centre of the earth to the centre of the sun. 
