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    Happy Autumnal Equinox!

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      Non-dune discussion

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    Happy Autumnal Equinox!

    Postby Freakzilla » 22 Sep 2010 09:16

    In the language of science, an equinox is either of two points on the celestial sphere where the ecliptic and the celestial equator intersect. For the rest of us, it's one of two times a year when the Sun crosses the equator, and the day and night are of approximately equal length.

    At the autumnal equinox (Sept. 22, 2010, 11:09 P.M.), the Sun appears to cross the celestial equator, from north to south; this marks the beginning of autumn in the Northern Hemisphere.

    The vernal equinox, also known as “the first point of Aries,” is the point at which the Sun appears to cross the celestial equator from south to north. This occurs about March 21, marking the beginning of spring in the Northern Hemisphere.

    On the date of either equinox, the Sun is above the equator and night and day are of approximately equal length; the word equinox is often used to refer to either of these dates.


    The equinoxes are not fixed points on the celestial sphere but move westward along the ecliptic, passing through all the constellations of the zodiac in 26,000 years. This motion is called the precession of the equinoxes. The vernal equinox is a reference point in the equatorial coordinate system.
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    Re: Happy Autumnal Equinox!

    Postby Eyes High » 22 Sep 2010 15:41

    Happy belated one. The moon was beautiful last night I noticed that. Yeah! Fall is here. Three cheers for Autumn in the South. :dance: :dance: :dance:
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    Re: Happy Autumnal Equinox!

    Postby Freakzilla » 22 Sep 2010 16:19

    I'm tired of sweating. :cry:
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    Re: Happy Autumnal Equinox!

    Postby chanilover » 22 Sep 2010 17:02

    Happy equinox! The weather here is great, really sunny and warm.
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    Re: Happy Autumnal Equinox!

    Postby Robspierre » 22 Sep 2010 17:55

    chanilover wrote:Happy equinox! The weather here is great, really sunny and warm.


    Strange, down in the desert it's been overcast, grey, and raining :shock:

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    Re: Happy Autumnal Equinox!

    Postby D Pope » 22 Sep 2010 18:43

    Woo Hoo!
    :dance:
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    Re: Happy Autumnal Equinox!

    Postby Aquila ka-Hecate » 23 Sep 2010 08:55

    Happy Vernal Equinox!

    That's the middle of Spring, not the start of it.

    That is, if you consider the Solticial points to be mid winter and mid summer - and I do, bugger what some NASA dude has to say.
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    Re: Happy Autumnal Equinox!

    Postby SandRider » 23 Sep 2010 14:00

    I'm not 100% sure of this, don't really remember how that works and what Freak posted just confused me,
    but I'm thinking that if you've planted your solstice markers correctly, sunrise and sunset should mark (geographical)
    due east & west ...






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    Re: Happy Autumnal Equinox!

    Postby merkin muffley » 23 Sep 2010 14:43

    Happy Mid-Autumn Festival.

    And nice shot!
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