Does Concorde leave the earths atmosphere?

Answer 1

No. The Concorde, as with any airplane, is dependent on the atmosphere to keep it above the ground, through its wings. The Concorde has a maximum "ceiling" of 60,000 feet, or about 12 miles above sea level (and about twice the elevation of Mt. Everest). If you could somehow stand on something at that height and be exposed to the atmosphere, it would be far too cold and the air too thin to survive, with only about 10 per cent of the air pressure that there is at sea level, but it is still significant. The Concorde is not capable of "flying" outside an atmosphere, as its jet engines require air to operate.