Photo of modern square level courtesy 123rf.com
Depending on where you live on Earth, you may be able to see the constellation, Norma, in tonight's sky. Being a musician and opera-lover, I immediately wondered if it had anything to do with Bellini's opera by the same name, but no, it does not. The full name of this constellation used to be Norma et Regula, which means "the level and the square", and this refers to carpenters' tools. For more information click here and click here. What did you learn today?
