This Halloween, take a tour with NASA's Exoplanet Exploration site of some of the most terrifying destinations in our galaxy. The nightmare world of HD 189733 b is the killer you never see coming. To the human eye, this far-off planet looks bright blue. But any space traveler confusing it with the friendly skies of Earth would be badly mistaken. via NASA http://ift.tt/2f5xN8K Amazing.