What does equinox mean in science?

Related questions

1. Is today an equinox?
2. What is today's equinox?
3. What does solstice and equinox mean?
4. What is the pagan name for the autumn equinox?
5. Is the longest day of the year the same length all over the world?
6. How does an Equinox affect the lengths of day and night?
7. How do Wiccans celebrate spring equinox?
8. What religion celebrates spring equinox?
9. Is the solstice always on the same day?
10. Why is there more than 12 hours of daylight on the equinox?

Tags

1. #vernal
2. #equinox
3. #earth
4. #autumnal
5. #equator
6. #crosses
7. #march
8. #occurring
9. #spring
10. #night
11. #approximately
12. #about
13. #making
14. #length
15. #plane
16. #september
17. #equal