I call them the days when Spring and Autumn begin.
They are widely but incorrectly called the equinoxes, but the equinoxes are
not events or dates. They are points on the map of the stars. Specificaslly,
they are the two points on the celestial equator there the ecliptic (the sun's
apparent annual path through the stars) crosses it.
The main events are: 1. Winter solstice - when the earth is tilted towards the sun. 2. Spring equinox - when day and night are equal in length. 3. Summer solstice - when the earth is tilted away from the sun. 4. Autumnal equinox - when day and night are equal in length.
The four astronomically significant days of the year are the winter solstice (around December 21st, shortest day of the year), the summer solstice (around June 21st, longest day of the year), the vernal equinox (around March 20th, when day and night are roughly equal length), and the autumnal equinox (around September 22nd, again when day and night are roughly equal length).
The Autumnal and Vernal Equinoxes, occurring around March 21st and September 23rd, are the two days of a given year that day and night are equal in duration. This happens because contrary to popular belief, the sun does not rise and set directly overhead, or perpendicular to the horizon for most of the year. The path that the sun travels across the sky is not perfectly centered, except of course during the equinoxes. Because the sun is directly overhead at 12 o'clock noon during the equinox, if you were to travel to the equator, you would not cast a shadow.
One year on Jupiter is equal to 11 Earth years
Twice, at the Summer and Winter Solstaces.
The equinox is when, twice each year, day and night are of equal length (about 22 September and 20 March).
The spring and autumn equinoxes, when day is equal to night in both hemispheres.
Aequabilis (adj) meaning Equal & Nox, Noctis (n, f) meaning Night.
Neither. All days are equal length.
The word "equinox" comes from Latin origins, where "aequus" means equal and "nox" means night. The term refers to the two days in a year when day and night are approximately equal in length.
1) Near the equator, year round. 2) Almost anywhere on Earth, around the equinoxes.
The days are of equal length
All days are are of equal length
no
No. That would be an Equinox. The solstice is when the earth is tilted at maximum angle, (23 1/2 degrees) from the plane of the orbit around the sun. Either north or south pole is closer. The exact difference of night and day will vary depending on where you are on earth.
equinox
Saturday