Tomorrow night, on Halloween, there will be a rare blue moon. (Thanks, Mother Nature, but this doesn’t let you off the hook for COVID-19, wildfires, extreme weather, etc.)Here’s what you need ...

PHILADELPHIA (CNN) -- Spooky season is almost upon us -- and this year it will be a little bit spookier. The night sky on Halloween will be illuminated by a blue moon, the second full moon in a ...