transit telescope

Any telescope that can swing in only one direction, up and down the north-south line in the sky, i.e. the observer's meridian. In optical astronomy a transit circle can be used to determine the positions of celestial bodies. In radio astronomy a transit telescope can be used to build up two-dimensional maps of radio sources: the Earth's daily rotation causes a radio source to move through the beam of the stationary telescope's antenna, providing information in the east-west direction, the direction in which the telescope points being altered slightly each day.

transit telescope

[′trans·ət ′tel·ə‚skōp] (optics) A telescopic instrument adapted to the observation of the passage, or transit, of an astronomical object across the meridian of an observer; consists of a telescope mounted on a single fixed horizontal axis of rotation which has a central hollow cube (sometimes a sphere) and two conical semiaxes ending in cylindrical pivots; the objective and eyepiece halves of the instrument are also fastened to the cube of the instrument, perpendicular to the horizontal axis. Also known as transit instrument.

单词	transit telescope
释义	transit telescope transit telescope Any telescope that can swing in only one direction, up and down the north-south line in the sky, i.e. the observer's meridian. In optical astronomy a transit circle can be used to determine the positions of celestial bodies. In radio astronomy a transit telescope can be used to build up two-dimensional maps of radio sources: the Earth's daily rotation causes a radio source to move through the beam of the stationary telescope's antenna, providing information in the east-west direction, the direction in which the telescope points being altered slightly each day. transit telescope [′trans·ət ′tel·ə‚skōp] (optics) A telescopic instrument adapted to the observation of the passage, or transit, of an astronomical object across the meridian of an observer; consists of a telescope mounted on a single fixed horizontal axis of rotation which has a central hollow cube (sometimes a sphere) and two conical semiaxes ending in cylindrical pivots; the objective and eyepiece halves of the instrument are also fastened to the cube of the instrument, perpendicular to the horizontal axis. Also known as transit instrument.
随便看	space rockets spacers spacer sequence spacer strip space rule spacer vest spaces space satellite space-saving space science space, science, and technology space science and technology advisory committee space science and technology department space science education resource directory space science pending international agreement database space science pending international agreements database space sciences space scientist spaces, confined, fear of space self maneuvering unit space sense space sensor spaces her out spaces him out space ship