This year, trick-or-treating probably doesn’t look like you thought it would, and Halloween parties are (hopefully, in the name of public health) cancelled, but there’s still something pretty spectacular going on tonight. Best of all, it’s free and you can probably see it from your own backyard (or fire escape). Not…
source https://lifehacker.com/how-to-spot-tonights-halloween-blue-moon-a-few-planet-1845535672