The Boeing 747SP is a shortened, long-range variant of the original 747 designed to fly farther with a smaller passenger load. Its reduced fuselage, modified tail, and lower weight supported ultra-long-range airline and government transport. One 747SP became SOFIA, a joint NASA and German Aerospace Center airborne observatory whose large infrared telescope operated above most of the water vapor in Earth's atmosphere.
Alerts for directly linked future launches and major activity.