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SSD Glossary
Vernal Equinox |
| The point on the celestial sphere where the Sun crosses the Earth's equatorial plane from south to north. Also called the first point of Aries. |
NOTE:
The list of defined terms to the left is by no means exhaustive with
respect to the general subject of solar system dynamics.
The terms listed are thought to be those more commonly used on our site
and thus appropriate for inclusion on this page.
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