Supermoon

Look Up Again! The Final Supermoon of 2016 Rises Tonight

You might be sick to death of hearing about “supermoons.” If that’s the case, I bring good news: tonight, December 13, you’ll see the final supermoon of 2016. If you’re not sick of them, I also bring good news, because you have one more supermoon to see.

Of course, where there is good news there is bad, and it’s this: The supermoon will make it very difficult to catch the Geminid meteor shower, which peaks tonight. Don’t give up, however; because of the sheer volume of meteors that comprise the Geminids, you might see some shooting across the sky.

Before last year, when the red harvest supermoon took over the world, you might never have heard of a supermoon. And now we’ve had three in a row to close out the year: October’s super hunter’s moon, November’s super beaver moon, and now December’s full cold or long nights supermoon. This is true in part because supermoon is not an astronomy term, but rather, one of astrology. (In case you are wondering about the difference: astronomy is science; astrology is make believe.) The name has stuck of late because it’s Twitter-friendly and a lot easier to remember than the actual name for the phenomenon: perigee-syzygy of the Earth–Moon–Sun system.

If you want to understand what’s going on and why there are so many supermoons recently, you really do need to look at the proper name. Perigee occurs when the Moon is…