Titlebook: Astronomy on the Personal Computer; Oliver Montenbruck,Thomas Pfleger Textbook 19942nd edition Springer-Verlag Berlin Heidelberg 1994 Astr

贪心

休闲

Deutsche Gesellschaft für Chirurgieiptic would then see the Sun, Moon and Earth in a straight line. Despite this, the shadow cast by the Moon rarely touches the Earth. Because of the inclination of its orbit, at the time of New Moon the Moon is usually above or below the Earth’s orbital plane, so its shadow misses the Earth. The Moon

泰然自若

jet-lag

frivolous

无可争辩

有害处

Introduction,ested in astronomy have such equipment at their disposal. This prompts the idea of using these computers for astronomical computation. What positive advantages are there in using one’s own computer, when one can obtain all the most important data required for observing, fully as accurately, in one o

obviate

Coordinate Systems,tric coordinates, which are based on the Sun, and geocentric coordinates, which are centred on the Earth. Ecliptic coordinates refer the position of a point to the plane of the Earth’s orbit, while equatorial coordinates are measured relative to the position of the Earth’s or celestial equators. The

图表证明

Calculation of Rising and Setting Times,h’s axis. Neither of these systems is particularly suitable, however, for an observer situated on the surface of the Earth. As such an observer (without being aware of it) takes part in the Earth’s daily rotation, it appears as if the Sun, Moon, and stars follow large arcs across the sky from East t

extinct