Can anyone answer this astronomy question?
Yes, I can answer the question. I have half a mind to stop right there. YA has a lot of people who will answer the question who will give a wrong answer just to get points. The north hemisphere vernal equinox is defined by the First Point of Aries on the ecliptic, currently era 2000 star charts. On the equinoxes, the declination of the sun is 0 degrees because it is crossing the ecliptic plane as seen from. The first points of Aries and Libra are where the celestial equator crosses the ecliptic. The first point of Libra is an outmoded navigational term that I didn’t know about until researching this answer.The north hemisphere autumnal equinox is simply the point opposite the First Point of Aries 6 months later when the sun is at 0 degrees declination. The north hemisphere winter solstice is when the declination of the sun is -23. 5 degrees south ( actually it’s 23. 42 degrees), the north hemisphere summer solstice is when the sun’s declination is +23.5 degrees. Star chart eras explana
