Please visit the NEW SITE for Flatbush Gardener
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The Earth's seasons are caused by the rotation axis of the Earth not being perpendicular to its orbital plane. The Earth's axis is tilted at an angle of approximately 23.44° from the orbital plane; this tilt is called the axial tilt. As a consequence, for half of the year (i.e. from around March 20 to around September 22), the northern hemisphere tips toward the Sun, with the maximum around June 21, while for the other half of the year, the southern hemisphere has this honor, with the maximum around December 21. The two instants when the Sun is directly overhead at the Equator are the equinoxes.
- Wikipedia: Equinox
The way I keep the story in my mind, Winter doesn't occur because Hades is evil/dark/etc. Persephone was not the keeper of the earth. The earth didn't miss her, Demeter did. Demeter grieved for her loss, and neglected her gardening duties, and that's why Winter occurs. Demeter rejoices at the return of Persephone, which restores her interest in the world, and that's when we get Spring.
The calendar may have set September 23 as the first day of autumn in 2007, but the forests that line the eastern shore of Lake Superior had already started to mark the turning of the season. By September 23, when the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite captured this photo-like image, the forests of northern Michigan and southern Ontario flamed orange as the first trees of the season—maples—began to display their brilliant red and orange fall colors. Veins of green run through the sea of orange where the deciduous forest gives way to deep green pine trees.New York State operates its own fall foliage watch. You can track the progress of the changes on the map provided on their Web site. They were predicting "vibrant, near-peak autumn color" this past weekend for the Adirondacks, the peachy area in northern New York state on the map below.
The most vivid color is concentrated in Canada’s Ontario Province. Located farther south, Michigan’s trees show only a hint of color. ...
The large image provides an unusually cloud-free view of all of the Great Lakes. Similar spots of color stretch across southern Canada and parts of Michigan, Wisconsin, and Minnesota. The northern plains of the United States have started to turn yellow as grasses ripen, but the eastern forests in Pennsylvania and New York remain deep green.
- Fall Colors around Lake Superior, NASA Earth Observatory
Vernal equinox and autumnal equinox. These names are direct derivatives of Latin (ver = spring, autumnus = autumn), and as such more apt to be found in writings. Although in principle they are subject to the same problem as the spring/autumn names, their use over the centuries has fixed them to the viewpoint of the northern hemisphere. As such the vernal equinox is the equinox where the Sun passes from south to north [across the equator], and is a zeropoint in some celestial coordinate systems. The name of the other equinox is used less often.
- Wikipedia:Equinox:Names
Vernal equinox and autumnal equinox. These names are direct derivatives of Latin (ver = spring, autumnus = autumn), and as such more apt to be found in writings. Although in principle they are subject to the same problem as the spring/autumn names, their use over the centuries has fixed them to the viewpoint of the northern hemisphere. As such the vernal equinox is the equinox where the Sun passes from south to north [across the equator], and is a zeropoint in some celestial coordinate systems. The name of the other equinox is used less often.
- Wikipedia:Equinox:Names
Locations of day and night on the earth at approximately 13:20 EDT, 17:20 UTC, less than nine hours before the 2006 autumnal equinox.
