vernal point

名词 n.
中文释义

英文释义

名词 n.
  1. The point on the ecliptic where the sun crosses from the southern celestial hemisphere to the northern, which occurs at the (northern) vernal equinox; less commonly, either this point or the opposite point of crossing from north to south.
    — In principle, the function is symmetrical with respect to the vernal points, the axes λ_H = 0° and λ_H = 180°.

词形变化

vernal points plural
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