I was driving home from work a day or two ago, and I noticed the newly risen moon in my rear-view mirror. I was trying to decide how close it was to being full, and also trying to stop paying attention to the (beautiful) moon in my mirror and look at the (boring) traffic on the highway in front of me.
I’m used to enjoying the beauty of the sunset during my drive home (only during some times of year, of course), but I don’t often see the moon rising. For a moment it threw me that I was seeing it, then I reminded myself that I was driving west but seeing the eastern sky in my rearview mirror.
That got me thinking about how to figure out when to look for the moon and where in the sky, and about the phases of the moon in general. I have a fairly long commute (at least forty-five to fifty minutes, depending on traffic), so I had plenty of time trying to construct diagrams in my head.
I understand how the different phases work in terms of the relative positions of earth, moon, and sun, in terms of how much and which part of the moon is illuminated, but I never remember how to factor in time of day. And the one thing I just couldn’t make sense of, in my mental diagrams, was the new moon.