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A suborbital science lab has been installed within the cabin of the SpaceShipTwo aircraft VSS Unity, which is the rocket-powered spaceplane that transports passengers for Virgin Galactic.
Source: https://thecurrent-online.com/news/how-long-is-the-virgin-galactic-flight/53050/
Virgin Galactic uses a "mothership" aircraft with two pilots that takes off from a runway, gains high altitude, and drops a rocket-powered plane that soars into space at nearly Mach 3 before gliding back to Earth.