赤纬时差图
地球仪8字形曲线
地球正投影仪

Analemma \An`a*lem"ma\ (-l[e^]m"m[.a]), n. [L. analemma a sun
dial on a pedestal, showing the latitude and meridian of a
place, Gr. 'ana`lhmma a support, or thing supported, a sun
dial, fr. 'analamba`nein to take up; 'ana` + lamba`nein to
take.]
1. (Chem.) An orthographic projection of the sphere on the
plane of the meridian, the eye being supposed at an
infinite distance, and in the east or west point of the
horizon.

2. An instrument of wood or brass, on which this projection
of the sphere is made, having a movable horizon or cursor;
-- formerly much used in solving some common astronomical
problems.

3. A scale of the sun's declination for each day of the year,
drawn across the torrid zone on an artificial terrestrial
globe.
※ ||