... as the vast, low-lying basin known as Sputnik Planitia (formerly Sputnik Planum) on the heart’s western lobe. Tombaugh Regio, which is Pluto's brightest region, has puzzled astronomers for a number of years as it aligns almost exactly opposite from...
... mountain range and resurfacing planes between what is now known as Tombaugh Regio (which is Pluto’s famous heart-shaped region, named after Pluto discoverer Clyde Tombaugh) and Cthulhu Regio (because why not name a Pluto region after H.P. Lovecraft...