the study of the theoretical effects of astronomical bodies and forces on the earth’s atmosphere.
the branch of astronomy that deals with the measurement of the positions and motions of the celestial bodies. Historical Examples The subject of Astrophysics does not admit of so definite a subdivision as that of astrometry. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 Various noun the branch of astronomy concerned with the measurement of […]
- Astrometric binary
a binary star that can be recognized as such because of its undulating proper motion. astrometric binary (ās’trə-mět’rĭk) See under binary star.
. . . astronomer astronomical astronomy
a person engaged in or trained for spaceflight. Contemporary Examples There will be the first doctor, whoever does it.The first astronaut, whoever does it. Jerry Springer Wants His Privacy Lloyd Grove April 17, 2010 “If I had said I wanted to be an astronaut, they would have been like ‘Do it’,” Rivers told me. Joan […]