Oh, nothing revolutionary. Just some really great looking photos, of the planet Earth, during our perception of “night”. With all the lights turned on, of course (or as many as possible). Regardless, it’s spectacular to see. To make the shots, NASA filter scans photos multiple times in order to detect the amount of light in individual pixels, boosting and dimming different parts of the image, as necessary. Using the day-night band technique allows them to produce photos as seen above — for science.