Vernal Equinox 2024 Uk. The equinox and solstice define the transitions between the seasons of the astronomical calendar and are a key part of the earth's orbit around the sun. Simon king has the answers.
The spring equinox, or the vernal equinox as it is more formally known, marks the astronomical start of spring, when the sun passes north over the celestial equator, a notional. The vernal equinox โ is an astronomical phenomenon when the sun, in its visible motion along the ecliptic, crosses the celestial equator.