 | John Lee Comstock - Physics - 1830 - 308 pages
...sun, as at 6, it is said to be in its aphelion. The line s, d, is the mean, or average distance of the planet's orbit from the sun. Ecliptic. The planes...of the sun. The plane of an orbit is an imaginary line, passing from one extremity, or side of the orbit, to the other. If the rim of a drum head be... | |
 | John Lee Comstock - Physics - 1832 - 308 pages
...any other planet, revolving around the sun, is in that part of its orbit nearest the Ecliptic.—The planes of the orbits of all the planets pass through...parchment extended across it, on which the drum is beaten. sun, as at a, it is said to be in its perihelion; and when in that part which is at the greatest distance... | |
 | John Lee Comstock - Physics - 1841 - 348 pages
...its aphelion. The line s, d, is the mean, or average distance of a planet's orbit from the sun. 758. ECLIPTIC. — The planes of the orbits of all the...side of the orbit, to the other. If the rim of a drum •lead be considered the orbit, its plane would be the parch lent extended across it, on which the... | |
 | John Lee COMSTOCK (and HOBLYN (Richard Dennis)), John Lee COMSTOCK - 1846 - 506 pages
...its aphelion. The line, s D, is the mean, or average distance of a planet's orbit from the sun. 550. Ecliptic.—" The planes of the orbits of all the...side, of the orbit, to the other. If the rim of a drum-head be considered the orbit, its plane would be the parchment extended across it, on which the... | |
 | Richard Phillips (sir.) - 1851
...average distance of a planet's orbit from the sun. 36. Ecliptic. — ( See diagram of Armillary sphere.) The planes of the orbits of all the planets pass through...or side, of the orbit to the other. If the rim of a drum-head be considered the orbit, its plane would be the parchment extended across it, on which the... | |
 | John Lee Comstock - Physics - 1852 - 576 pages
...its aphelion. The line SD, is the mean, or average distance of » planet's orbit from the Sun. 128. ECLIPTIC. — The planes of the orbits of all the planets pass through the center of the Sun. The plane of an orbits an imaginary surface, passing from one extremity, or side... | |
 | Sarah S. Cornell - Geography - 1857 - 420 pages
...centre of the sun. It must be borne in mind that the plane of an orbit (in the sense here used) is only an imaginary surface, passing from one extremity,...side, of the orbit to the other. " If the rim of a drum-head be considered an orbit, its plane would be the parchment extended across it." " Let us suppose... | |
 | Sarah S. Cornell - Geography - 1857 - 422 pages
...earth, etc. ; and the lower divisions are used for finding the beginning, end, and duration of twilight ECLIPTIC. — The planes of the orbits of all the planets pass through the centre of the sun. It must be borne in mind that the plane of an orbit (in the sense here used) is only an imaginary surface,... | |
 | Sophia S. Cornell - Geography - 1861 - 414 pages
...lower divisions are used for finding the beginning, end, and duration of twilight. ECLIPTIC.—The planes of the orbits of all the planets pass through the centre of the sun. It must be borne in mind that the plane of an orbit (in the sense here used) is only an imaginary surface,... | |
 | Sophia S. Cornell - Geography - 1867 - 424 pages
...the lower divisions are used for finding the beginning, end, and duration of twilight ECLIPTIC.—The planes of the orbits of all the planets pass through the centre of the sun. It must be borne in mind that the plane of an orbit (in the sense here used) is only an imaginary surface,... | |
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Ecliptic. — The planes of the orbits of all the planets pass through the centre of the sun. The plane of an orbit is an imaginary surface, passing from one extremity or side of the orbit, to the other. If the rim of a drum head be considered the orbit,... 
