What exactly is a planet? Controversy over this question led to Pluto’s redefinition, along with a brand-new English word. And: Some people now use the phrase all the things! to mean and whatnot or you know what I mean. This new sense of all the...
Astronomers have spotted nearly 150 objects far out in space that are too small to be called stars, but they can’t be called planets, because they don’t orbit a star. They’re about the size of Jupiter, but given what we know about astrophysics...