Caption: 
Pluto’s northern Sputnik Planitia glacier (in the western or left side of Pluto’s brightheart) is shown here in a color mosaic made from New Horizons imagery. The direction of north is shown on the image.  The image is ~ 700 x 350 kilometers across. The red box has been added to show most of the region containing dark features attributed to the wetting of the glacier by liquid nitrogen sourced from a “basil melting” process beneath the glacier, as described in the published paper by Stern et al. (2026)