What is an equinox and what happens when it occurs?
- Anonymous1 decade agoFavorite Answer
Go to .... and you will find your answer there
- Stephen BLv 41 decade ago
Equinoxes occur twice a year, when the tilt of the Earth's axis is oriented neither from or to the Sun, causing the Sun to be located over the equator. The name is derived from the Latin aequus (equal) and nox (night), because at the equinox the night and day are equally long. The term equinox can also be used in a wider sense, as the date (day) that such a passage happens.. Because of magnetic anomalies, it has been said you can balance a egg on it's upright end and it will balance like that, only if set up on the equinox. that's what I do...and go naked camping in palm springs with the wiccans.Source(s): Wickapedia
- 1 decade ago
Ecliptic, in astronomy, the apparent great-circle annual path of the Sun in the celestial sphere, as seen from Earth. It is so named because eclipses occur only when the Moon is on or near this path. The plane of this path, called the plane of the ecliptic, intersects the celestial equator (the projection of Earth's equator on the celestial sphere) at an angle of about 23°27’. This angle is known as the obliquity of the ecliptic and is approximately constant over a period of millions of years, although at present it is decreasing at the rate of 48 seconds of arc in each century and will decrease for several millenniums until it reaches 22°54’, after which it will again increase.
The two points at which the ecliptic intersects the celestial equator are called nodes or equinoxes. The Sun is usually at the vernal equinox on March 20 or 21 and at the autumnal equinox on September 22 or 23. Halfway on the ecliptic between the equinoxes are the summer and winter solstices. The Sun usually arrives at these points on June 21 or 22 and December 21 or 22, respectively. The names of the four points correspond to the seasons beginning in the Northern Hemisphere on these dates. The equinoxes do not occur at the same points of the ecliptic every year, for the plane of the ecliptic and the plane of the equator revolve in opposite directions. The two planes make a complete revolution with respect to each other once every 25,868 years. The movement of the equinoxes along the ecliptic is called the precession of the equinoxes. A correction for precession must be applied to celestial charts to find the true position of the stars at any given time.
The ecliptic is also used in astronomy as the fundamental circle for a system of coordinates called the ecliptic system. Celestial latitude is measured north and south of the ecliptic; celestial longitude is measured east and west of the vernal equinox.
In astrology, the ecliptic is divided into 12 arcs of 30° each, called the signs of the Zodiac. These signs, or “houses of heaven,” are named after the constellations through which the ecliptic passes.Source(s): Encarta Encyclopedia 2006
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- DLMLv 71 decade ago
It's the two times a year when the entire surface of the earth receives equal amounts of daylight and nighttime, regardless of latitude.
The sun (as viewed from earth) "crosses" the equator. Actually, it's not the sun that is moving, but the earth's tilt in tandem with it's orbit that makes it appear that this is happening.
Use that wikipedia link the first answerer gave you, it explains it very well.