Question

What is ravalution,parallax, and equnoxiss

Answer 1

arallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.  (parallaxis), meaning "alternation".

An equinox is the moment in which the plane of Earth's equator passes through the center of the Sun,[2] which occurs twice each year, around 20 March and 23 September.

On an equinox, day and night are of approximately equal duration all over the planet. They are not exactly equal, however, due to the angular size of the sun and atmospheric refraction. To avoid this ambiguity, the word equilux is sometimes (but rarely) used to mean a day in which the durations of light and darkness are equal.[3][note 1] See Length of equinoctial day and night for further discussion.