Astronotes Armagh Planetarium's Stellar Blog! ... Earth Satellites . ... Shadowy spacecraft: OTV 1 on its return to Earth after its secret mission. ... For more up to date information on the X-37, see X-37: Speculation, Secrets and Espionage .) ... ItтАЩs the successor of the White Knight and both have been used in the past to test drop the X-37, X-37B and Virgin Galactic SpaceShipTwo. ... Once deployed into space the spacecraft began its orbit of the Earth which lasted until 3 December 2010. ...