noun
vernal equinox point; vernal equinox
Astronomical term for the point on the celestial sphere where the sun crosses the celestial equator from south to north, marking the beginning of spring in the Northern Hemisphere.
春分点は、天の赤道と黄道が交わる二つの点のうちの一つです。
The vernal equinox point is one of the two points where the celestial equator and the ecliptic intersect.
太陽が春分点を通過すると、昼と夜の長さがほぼ等しくなります。
When the sun passes the vernal equinox point, day and night become nearly equal in length.