HAPS – missions to the edge of space to watch over Earth

Is it a bird? Is it a plane? No, it's a High-Altitude Pseudo-Satellite (HAPS) - an uncrewed airship, plane or balloon watching over Earth from the stratosphere. Operating like satellites but from closer to Earth, HAPS are the 'missing link' between drones flying close to Earth's surface and satellites orbiting in space. They float or ["]