Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. What is a “blue moon”? Tonight’s full moon, which happens ...

Large in the sky and perfectly round, Monday night’s super blue moon is an attention-getter. But how rare, really, is it? It is unusual because it’s both blue and super. According to NASA, about 25% ...

A rare sky spectacle will occur Monday night that (probably) won't happen again for years: A full moon that can be called both a supermoon and blue moon will grace the night skies over the U.S. Dubbed ...

Value-conscious sky watchers can rejoice Monday as the night could bring into focus a rare two-for-one: a supermoon and a seasonal blue moon converged for a single viewing. NASA says that combination ...

On Monday night, serious moon viewers may notice something different about the moon — if you look hard enough. The full moon will be a blue supermoon, a celestial occurrence that combines two events: ...

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