An equinox occurs twice a year, when the tilt of the Earth's axis is inclined neither away from nor towards the Sun, the Sun being vertically above a point on the Equator. The term equinox can also be used in a broader sense, meaning the date when such a passage happens. The name "equinox" is derived from the Latin aequus (equal) and nox (night), because around the equinox, the night and day are approximately equally long. It may be better understood to mean that latitudes +L and -L north and south of the equator experience nights of equal length.
The word is also used for the same event happening on other planets and in setting up a celestial coordinate system; see equinox (celestial coordinates).
At an equinox, the Sun is at one of two opposite points on the celestial sphere where the celestial equator (i.e. declination 0) and ecliptic intersect. These points of intersection are called equinoctial points: By extension, the term equinox may denote an equinoctial point.
The Spring 2010 Spring equinox happened on March 20th 2010, 17:32 in time when a location on the Earth's Equator where the centre of the Sun can be observed to be vertically overhead....and a egg can be stood on end....Or something like that.....
Oops, forgot to read description. ;)
hefland 1 year ago
were you at the equator at equinox at that time? In Ecuador maybe?
hefland 1 year ago