Breathe Deep Pluto's Gathering Gloom

At this point, the New Horizons probe is nearly 400 million kilometers past Pluto, more than twice the distance from the Earth to the Sun, now almost a year after it shot past the diminutive ice world. But on July 15, 2015, just after it passed Pluto, it turned around and took a series of high-resolution images looking back toward Pluto. Those images have been processed and put together into a stunning mosaic, shown above. Well, a small version of it; click it to get the magnificent 5,000 x 7,30...