What do the equinoxes signify?
a change in ocean tides
a partial lunar eclipse
a change in the seasons
a change in lunar phases
a period during which earth’s axis is tilted at the maximum

The equinoxes signify a change in the seasons. The equinoxes are the main circumstances when the sun based eliminator is opposite to the equator. Therefore, the northern and southern halves of the globe are similarly enlightened. The equinoxes are the main circumstances when the subsolar point is on the equator, implying that the Sun is precisely overhead at a point on the central line.

1.989×10^30 kg is the weight of the sun.