How NASA Moves a Spacecraft: Europa Clipper Arrives in Its New Home

Supersonic Aircraft: NASA has been researching supersonic flight and developing technologies to reduce the sonic boom produced by supersonic aircraft. The X-59 QueSST (Quiet Supersonic Technology) is an experimental aircraft aimed at demonstrating quieter supersonic flight.

Hypersonic Aircraft: Hypersonic flight involves speeds greater than Mach 5 (five times the speed of sound). NASA has been working on hypersonic research to develop vehicles that can travel at incredibly high speeds within the Earth's atmosphere.

Electric and Hybrid-Electric Aircraft: Researchers are exploring electric and hybrid-electric propulsion systems for aircraft to reduce emissions and increase efficiency.

Unmanned Aerial Vehicles (UAVs): UAVs, commonly known as drones, have advanced significantly in recent years for various applications, including surveillance, research, and cargo delivery.

Spaceplanes: Spaceplanes are vehicles that can operate both within Earth's atmosphere and in space. NASA has explored concepts like the X-37B, a reusable spacecraft used for various experimental missions.

Experimental Aircraft: NASA and other organizations have developed experimental aircraft to test new technologies and concepts. These aircraft often push the boundaries of aerodynamics and design.

It's important to note that technology and research continue to evolve, and new developments may have occurred since my last knowledge update. If you're referring to a specific concept or term that has emerged after September 2021, I recommend checking more recent sources for the latest information.