The largest Full Moon of 2019 arrives on February 19. The moon’s disk will continue to fill with light until Tuesday morning. At that time, the February full moon, known as the Snow Moon or Hunger Moon will occur among the stars of Leo (the Lion). Since the moon will reach its full phase about midway between Monday and Tuesday evening, to the casual eye it will appear full on both nights. But if you look closely at the moon on Monday night, you’ll be able to see that the craters in a narrow strip along the moon’s left (or western) edge will have shadows. On the following night, that textured strip will migrate to the moon’s opposite (eastern) edge because the moon has crossed the line connecting the sun and Earth.