NASA revamped its Image and Video Library website in 2017 to make a massive trove of free imagery available to the public in high resolution. Here’s a look at 20 of the most popular shots in NASA’s photo collection. #1. Earth “Behold one of the more detailed images of the Earth yet created. This Blue Marble Earth montage shown above — created from photographs taken by the Visible/Infrared Imager Radiometer Suite (VIIRS) instrument on board the new Suomi NPP satellite…