8字曲線,赤緯時差圖,地球儀8字形曲線,地球正投影儀

What he introduced included oval projection, stereographic projection, analemma and scenography etc. 關(guān)于投影幾何，他帶來的有橢圓投影、球極投影、平行正投影和透視法等。

The answer is no, and the shape traced out by the Sun over the course of a year is called an analemma. 答案是不會，太陽一年中運行的軌跡叫做太陽的八字曲線。

The Sun will appear at its highest point of the analemma during summer and at its lowest during winter. 太陽在夏天會出現(xiàn)在八字曲線的最高點，在冬天則出現(xiàn)在最低點。

One simple use for this is to display the Sun's "analemma" - the "figure eight" shape traced out by the Sun at noon over the course of a year. 一個例子是顯示太陽的“日行跡”-你一年每天在同一時間記錄太陽在天空的位置,就得到太陽的8字型軌跡。

Explanation: An analemma is that figure-8 curve you get when you mark the position of the Sun at the same time each day throughout planet Earth's year. 說明：日行跡是一條8字形的曲線，標(biāo)示了地球全年中每天同一時間太陽所在的位置。