The moon undergoes eight distinct phases in its approximate 29.5-day cycle: New moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter and waning crescent.

Don't miss the third quarter moon rising with Saturn and the constellation Pisces in the eastern sky at midnight tonight! July's third quarter moon phase occurs at 8:38 EDT (0038 GMT) on July 17 ...