zodiac
solar eclipse
solar day
sidereal day
lunar nodes
lunar eclipse
vernal equinox
summer solstice
winter solstice
autumnal equinox
the two points that allows for eclipses to occur located at the point the moon's orbit cuts the ecliptic.
can only occur at Full Moon, when the Earth is directly between the sun and the moon blocking the sunlight from reaching the moon
the period of time between the instant when the sun is directly overhead to the next time it is directly overhead
the time for one complete rotation of the earth relative to the Sun, about 4 minutes shorter than a mean solar day 23 hours 56 minutes
point on the ecliptic where the sun is at its most northernmost point above the celestial equator, occurring on June 21st
occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth and is possible only during the new moon phase
the equinox in spring, on about March 20 in the northern hemisphere
the twelve constellations on the celestial sphere through which the Sun appears to pass during the course of a year
point in the ecliptic where the sun is at it southern most point below the celestial equator, occurring on December 21st
the equinox in autumn, on about September 22 in the northern hemisphere
