Come on, what are the odds?! Creepy and eerie things awalys seem to happen around Halloween but this is out of this world...literally. NASA Tweeted about a dead comet that will fly by earth on Halloween. It's referred to as a dead comet because it's lost most of it's ice and gases. It first flew by earth on Halloween 2015 and NASA called it "The Great Pumpkin" but now it looks eerily like a skull!