Moon: first quarter Moon: first quarter Illustration of the moon undergoing phases; first quarter is heading towards a full moon. meteorology, atmosphere, sky, tide, tidal, effect, moon, lunar, space, night 2005-06-27 image/svg+xml Moon: first quarter 2005-06-27 Integration and Application Network https://ian.umces.edu/media-library/moon-first-quarter/ https://ian.umces.edu/media-library/moon-first-quarter/ en-US meteorology, atmosphere, sky, tide, tidal, effect, moon, lunar, space, night Illustration of the moon undergoing phases; first quarter is heading towards a full moon.