Hopkinsville, Kentucky, is normally a mid-size town, home to 32,000 people and a big bowling ball manufacturer. But on August 21, its human density more than tripled, as around 100,000 people swarmed toward the total solar eclipse. Hundreds of miles above the crowd, high-resolution satellites stared down, snapping images of the sprawl. These satellites belong to a company called DigitalGlobe, and their cameras are sharp enough to capture a book on a coffee table. And a lot can happen between brunch and dinner.