The HYPSO-3 satellite weighs 7 kg and has solar panels on its wings. Credit: Kongsberg NanoAvionics It's slightly larger than a 5-liter water bottle, and is whizzing around the Earth at a speed of 7.5 kilometers per second. The satellite has two cameras built into its body, and can be controlled quickly and turned smoothly in all directions. HYPSO-2 has a special job, monitoring algae. Large algae blooms can cause major damage, poison drinking water and mass fish deaths. "The new satellite means...