@worldofastronomers: 🔥 Imagine an aircraft moving so fast that it could cross the entire planet in just a few hours. NASA’s X-43A was an experimental unmanned hypersonic aircraft that reached about Mach 9.6—roughly 11,000 km/h. At that speed, a theoretical trip around Earth’s circumference would take only around 3½ hours. The X-43A wasn’t actually designed to circle Earth, though; it was built to test scramjet-powered hypersonic flight, pushing the limits of atmospheric flight. 🚀 The wildest part? It achieved those speeds while using air-breathing propulsion rather than carrying all the oxidizer a conventional rocket needs. This was a glimpse of what ultra-fast atmospheric flight could eventually become. 🌍 Follow us (World Of Astronomers) if you want more footage of humanity pushing the limits of flight and space exploration. #WorldOfAstronomers #NASA #X43A #Hypersonic #Mach9

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Saturday 12 September 2026 04:25:08 GMT