Friday, August 5, 2011
How do I draw a picture of Vernal Equinox?
Draw two rings of same size (in profile they present as ellipses) pin-jointed at opposite ends of their common diameter. Designate the horizontal one as "Equator" and the tilted one as "Ecliptic", ensuring that the angle (or at least mark it) between them is 23�.45 . The point where the Ecliptic (tilted, non-horizontal) circle rises mark the jointed point as 'Vernal Equinox' and its twin on the other side as 'Autumnal Equinox'. Give appropriate arrow directions on the ring to indicate Sun's (apparent as seen from Earth). For better effect mark the figures of Zodiac on the Ecliptic (Aries starts at VE & Libra starts at AE).
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