It’s that wonderful time of year again, when Halloween passes, and Christmas commercials dictate the airwaves.  I’m still in the tolerant stages of hearing bells ringing in commercials, where they remind me that the northern hemisphere is once again treated to a familiar sight.  The return of the Orion nebula! In reality, it didn’t go anywhere.  Earth’s predictable motion around the Sun means that Northern Hemisphere observers see the sky gradually appear to move a bit further West each night.  This is the time of year when Orion rises around 9pm, making it easily visible by midnight.  I consider midnight...