Military aircrafts fly the same height as the commercial airplanes do. The cruising altitude maybe 30000 feet to 45000 feet. Planes like SR-71 have gone upto the maximum of 85,000 feet.
They fly in air. High-performance military fighter jets have engines powerful enough that they can fly straight up, like a 'rocket ship'. But aside from those, all airplanes need air in order to remain aloft.
No. If you live in the US, most of the vapor trails you see on any given day are the products of civilian jetliners, not military aircraft.
Military fighter jets typically fly at altitudes ranging from 20,000 to 50,000 feet, depending on their mission and capabilities. Some advanced fighters can reach even higher altitudes, up to 65,000 feet or more, particularly during high-altitude reconnaissance missions. The specific altitude can vary based on factors such as the aircraft type, operational requirements, and airspace regulations.
I said it is a Astronomer
Many military jets can fly up to or over 50,000 feet.
Most military fighter jets run with a single pilot and a flight officer. The Flight Officer is not trained to fly the aircraft.
They usually fly at an altitude of 30,000 to 35,000 feet, to avoid bad weather.
Most prop planes fly any where from 1,000-5,000 ft. Airliners usually fly from 10,000-20,000 ft. Military jets fly at pretty much any altitude
Passenger planes can't fly at 55,000 feet. Gulfstream business jets can fly 51,000 feet altitude, and airliners like to cruise at 35,000 feet. Some military planes, like the U-2, can fly at 55,000 feet or greater.
jets
No, Your best option is to join the Military
Most aircraft do not travel in the stratosphere. Some military and passenger jets fly in the stratosphere, but most aircraft fly in the troposphere, below the stratosphere.