In Boston and surrounding towns, this phenomenon will occur between 9:26 p.m. and 10:42 p.m. (disappearance and reappearance times). While it will be easy to see the moon and Mars early in the evening with the naked eye, watching the actual occultation will require a bit of hardware, say binoculars or a telescope.

"Mars' time and position of reappearance is difficult to judge since the planet lies concealed behind the moon beforehand," the league said. Why is it called the Wolf Moon? The mo