Equinox Either of the two points of intersection of the Sun's apparent annual path and the plane of the Earth's equator.
Equinox: Either of two occasions during the year when the apparent sun's path crosses the plane of the Earth's equator.
EQUINOX The point at which the ecliptic intersects the celestial equator. Days and nights are most nearly equal in duration.
Equinox - the time when the sun crosses the equator and day and night are everywhere of equal length ...
Equinoxes: The time at which the Sun passes directly overhead at the equator at noon.
Evaporation: The change of liquid water to water vapor.
Eye: The clear area of lowest pressure at the center of a strong tropical cyclone.
Equinox - the exact time the sun is directly above the equator. This happens twice per year, to start both spring and fall.
Freezing rain - rain that freezes after it hits the ground or other object and forms clear ice.
equinox: either of two points where the sun's rays will shine directly over the equator at noon, and all locations on earth will theoretically experience twelve hours of daylight.
Equinox
The time when the sun crosses the earth's equator, making night and day of approximately equal length all over the earth and occurring about March 21 (the spring or vernal equinox) and September 22 (autumnal equinox).
Equinox - The point in time when the vertical rays of the Sun are striking the equator. In the Northern Hemisphere, March 20 or 21 is the vernal or spring equinox and September 22 or 23 is the aiitunnal equinox.
Equinox The time when the sun crosses the plane of the earth's equator occurring about March 21 and September 22.
Evaporation The process by which a liquid changes into a gas.
Equinoxes The first days of spring and autumn when day and night are of equal length at all latitudes (except the poles) and the noon sun is directly over the equator.
fall equinox"Same as autumnal equinox.
fall velocity"See terminal fall velocity.
Vernal Equinox The beginning of spring in the Northern Hemisphere. The time/day that the sun crosses the equatorial plane going from south to north.
Equinox:Meaning equal.
Equinox: Fall: Occures on or about September 21st.
Equinox: Spring: Occures on or about March 21st.
Estimated Ceiling: Report given by a pilot. Use of a ceiling balloon.
Eye: The center of a hurricane.
Equinox- The twice-yearly occurrence (about March 21 and September 21) when the sun at its highest point crosses the equator.
Extratropical Cyclone- A cyclone that forms outside of the tropics.
The equinox at which the sun approaches the Southern Hemisphere, marking the start of astronomical autumn in the Northern Hemisphere. The time of this occurrence is approximately September 22. On that day, daylight is everywhere 12 hours.
AUTUMNAL EQUINOX
A day of equal day and night that marks the beginning of fall and occurs when the sun passes directly over the equator.
For example, in the Northern Hemisphere, winter is said to begin on the winter solstice and end on the vernal equinox when spring begins, covering the months of December, January, and February.
The declination is ~23°N at the summer solstice, ~23°S at the winter solstice, and 0° (over the equator) at the spring and autumn equinoxes.
This value is 0 at the vernal equinox, 90 at the summer solstice, 180 at the autumnal equinox and 270 at the winter solstice.
winter - Astronomically, between the winter solstice and vernal equinox in the Northern Hemisphere, and the summer solstice and autumnal equinox in the Southern Hemisphere; the coldest season of the year; ...
In the United States, the seasons are often considered to begin at the astronomical solstices and equinoxes: these are sometimes known as the "astronomical seasons".
Tropical Year - The time measured from one vernal equinox to the next; that is, the apparent revolution of the sun through the zodiac, equal to 365.2422 mean solar days or 365 days, 5 hours, 48 minutes, 46 seconds.
the sun--that is, the time it takes the Earth (as seen from the sun) to reappear at the same fixed star, equal to 365.2564 mean solar days or 365 days, 6 hours, 9 minutes, 10 seconds. b) Tropical Year: The time measured from one vernal equinox to ...
Most often these are locations near the equator which measure more abundant rainfall at or shortly after the equinoxes (March and September), a period of high sun.
Customarily, this refers to the months of September, October, and November in the North Hemisphere and the months of March, April, and May in the Southern Hemisphere. Astronomically, this is the period between the autumnal equinox and the winter ...
It is the interval between two consecutive returns of the sun to the vernal equinox. In 1900, that took 365 days, 5 hours, 48 minutes, and 46 seconds, and it is decreasing at the rate of 0.53 second per century.
 See also: Earth, Weather, Water, Atmosphere, Temperature
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