2021 USPS Forever Stamps will feature stunning NASA Sun images

NASA has captured a dizzying array of Sun images showing our star off in a variety of light, using contrast and color to showcase coronal loops, sunspots, coronal holes, plasma blasts, solar flares, and more. A selection of these images, each showing different solar phenomena, are coming to the USPS in the form of new Forever Stamps. The US Postal …