The moon's phases are caused by the changing angle from which the sun illuminates it as the moon makes its way around the Earth. What to look for The current phase of the moon is waxing gibbous.

So the extra full moon is the third full moon that occurs in a season when there are four full moons. That’s the “blue moon.” A “blue moon” doesn’t happen often, or regularly. The next “blue moon” ...

This week, you have an easy guide: our waxing gibbous moon.This all starts Tuesday, June 27. Look for our waxing gibbous moon near Spica, the brightest star in the constellation Virgo.