Once in a Blue Moon

Mark your calendar for January 31 to see the first total lunar eclipse in a couple of years.  The moon appears as a supermoon beginning on January 30.  It will be the first “blue moon” of 2018. It will be best viewed on the West Coast, but Michigan viewers should be able to see at least some of it. For more, read this Sky & Telescope article; login with GRCC credentials.

“Blue Moon”? Astronomy Encyclopedia defines it as “Occasional blue colour of the Moon, due to effects in the Earth’s atmosphere. It can be caused by dust particles, from volcanoes or forest fires, high in the upper atmosphere, which scatter light, making it appear blue. The expression sometimes refers to the occurrence of a second full moon in a calendar month, something which occurs about seven times every 19 years, and it is used in everyday speech to denote a rare event.”Total lunar eclipse

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