| 释义 |
Keplerian, a.|kɛˈplɪərɪən|
[f. prec. + -ian.]
Of or pertaining to Kepler or his discoveries and investigations; applied spec. to (a) motion, orbits, and trajectories such as occur when one body moves freely in the gravitational field of another (much more massive) body, viz. an ellipse (in accordance with Kepler's laws) or some other conic section; (b) a refracting telescope that has a positive objective and a positive eyepiece and gives an inverted image.
1851Mill Logic (ed. 3) I. iii. ii. 313 If the Keplerian operation, as a logical process, be really identical with what takes place in acknowledged induction, the definition of induction ought to be so widened as to take it in. 1909Webster, Keplerian telescope. 1922A. D. Udden tr. Bohr's Theory of Spectra ii. 37 The orbit of the electron deviates a little from a simple ellipse and is no longer exactly periodic. This deviation from a Keplerian motion is, however, very small compared with the perturbations due to the presence of external forces. 1935E. A. Milne Relativity, Gravitation & World-Struct. xiv. 267 Newton..determined the nature of the possible motions of the particle and showed that it consisted of Keplerian orbits, or parabolas or hyperbolas with Keplerian properties. Ibid., Newton's solution of the Keplerian problem. 1958Listener 20 Nov. 839/1 The Keplerian universe, which did away with the epicycles, was systematically ignored by Galileo. 1959K. A. Ehricke in H. S. Seifert Space Technol. viii. 92 Figure 8–50 presents a survey of possible Keplerian (in distinction to powered) mission profiles for the inner and outer solar system. 1966McGraw-Hill Encycl. Sci. & Technol. VII. 452/2 If the second lens has a positive power, the telescope is called a..Keplerian telescope and the separation of the two parts is equal to the sum of the focal lengths. 1966Daily Tel. 31 Oct. 9/8 True weightlessness..can best be simulated in an aircraft flying in a so-called Keplerian trajectory. 1968R. A. Lyttleton Mysteries Solar Syst. iv. 124 It is to be remembered that in computing an orbit, the aim is to obtain a Keplerian path about the sun—an ellipse, parabola, or hyperbola—that fits the observation. |