Dark matters

Remember that on this, the longest night of the year, the invisible space squids (which constitute most of the matter in the universe) will be blotting out the moon with their ink.

Light a candle to frighten them away.

ETA: I was misled by comments on the radio, and didn't check the details carefully enough on my (excellent) calendar.  The eclipse and the moment of solstice were on the same calendar day, but the longest night was the night after that of the eclipse.  Mea culpa.