Mark your calendar for the upcoming winter meteor shower: the Geminids are next. This December shower is described as very active, with up to 120 multicolored “falling stars” peaking on Dec. 13. Fog permitting, begin watching eastward in the early evening hours, as the twins constellation of Gemini rises. The new moon of Dec. 12 brings extreme morning high tides in the 6-foot range, if your plans include beachcombing. As always, never turn your back…