From the November 2009 issue

Stephen James O’Meara’s Secret Sky: Test your vision: The perigee Moon

January 2010: Take advantage of January's lunar opportunities by locating these naked-eye features.
By | Published: November 23, 2009 | Last updated on May 18, 2023
Stephen James O'Meara

While looking at the Moon, have you ever wondered what the finest feature visible to the unaided eye might be? This month is a good time to find out because we have two Full Moons in a calendar month: on the evenings of December 31/January 1 and January 29/30.