| 释义 |
subˈstellar, a.
1. Navigation and Astr. [sub- 1 a.] Applied to a point on the surface of the earth which lies on a line joining some particular star and the centre of the earth, i.e. a point at which the star is vertically overhead.
1910C. L. Poor Nautical Sci. vii. 154 To find the substellar point..it is necessary for the observer to know the sidereal time at which the observation is made. 1938[see sublunar a. 2]. 1967P. van de Kamp Princ. Astrometry ii. 19 The terrestrial longitude and latitude of a substellar point equal the Greenwich Hour Angle (GHA) and declination of the star.
2. Astr. [sub- 14.] Much smaller than a typical star.
1973Physics Bull. Nov. 648/1 The shock wave preceding a black hole of substellar mass could explain both the scale of damage caused and the visual effects observed. 1978Nature 24 Aug. 781/1 The resolution and sensitivity of the spinning infrared interferometer suggest other applications, for example, to cool features other than planets (such as dust rings or substellar companions). |