If you ever have that nagging feeling that you are being watched, you might not be wrong. But with your watcher being 423 miles above you, you might have a hard time confirming your suspicions. And while being spied upon from such a distance may seem like not much detail can be realized, you might be in for a surprise–the GeoEye-1 Satellite, which just achieved “full operational capability certification from the National Geospatial-Intelligence Agency” (NGA), can capture images on the ground down to 0.41 meters