Look up: Rare Blue Moon and 4 planets will shine across the sky at the end of May

Skywatchers, get ready — May is ending with the second full moon of the month, known as a Blue Moon.MAY SKYWATCHING GUIDE: FROM METEOR SHOWERS TO MICROMOONS, HERE IS WHAT TO LOOK UP FORThis rare celestial event will occur on May 31, and despite its name, the moon will not actually appear blue.