The Ice (which is - probably - made of frozen Nitrogen) that appears to have accumulated on the Plutonian Uplands situated on the right side (Dx) of this approx. 390-miles (such as about 627,6426-Km) wide image, is draining from Pluto's Mountains onto the (so far) informally named Sputnik Planum, through the roughly 2- to 5-miles (such as about 3,21 - to 8,0467-Km) wide Valleys located near the center of the frame. The Flow Front of the Ice that is (slowly) moving into Sputnik Planum is clearly visible towards the center left side (Sx) of the picture. The origin of the Ridges and Pits located on the right side (Dx) of the image is still uncertain. The picture (which is an Original NASA - New Horizons Spacecraft's b/w and NON Map-Projected frame published on the NASA - Planetary Photojournal with the ID n. 19944) |