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| The equinoxes At the times when the Sun is crossing the celestial equator day and night are of nearly equal length at all latitudes and so we call these dates the equinoxes. In March, as the Sun is moving northwards along the ecliptic, this is called the vernal equinox and in September as the Sun is moving southwards we refer to it as the autumnal equinox. The equinoxes are also the points on the celestial sphere where the ecliptic and equator cross and the vernal equinox is used as the zero point in measuring star co-ordinates The solstices The times when the Sun is at its furthest from the celestial equator are called the summer and winter solstices and these occur in mid-summer and mid-winter. Equinoxes and solstices : Time & timekeeping : Fact files & in-depth : Learning : NMM
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I'm being dead cheeky, but I dont often get the chance as I cant usually tell when things are wrong
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| Just to put the record straight......Let me know the last time I corrected anything.....apart from my most recent post concerning London post codes
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| did you have to remind me again of my mistake
__________________ The law is powerless to help you, but not powerless to punish you. |
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