Lunar phases are cyclically recurring appearances of the Moon due to differing amounts of sunlight reflected by the Moon toward Earth
during the Moon's orbit. The eight phases are: new moon, waxing crescent, first quarter, waxing
gibbous, full moon, waning gibbous, last quarter, and waning crescent. New
moon is when the sunlit (daytime) side of the Moon is facing away from us;
full moon is when it is facing toward us and thus directly opposite the
Sun in the sky.