What is NASA's X-59 and why did its first flight matter?

The answer

On October 28, 2025, NASA's X-59 Quesst aircraft completed its historic first flight, demonstrating technology that reduces the sonic boom to a quiet 'thump' about as loud as a car door closing. Traditional supersonic jets create shockwaves that produce ear-splitting booms, which is why supersonic flight over land has been banned in the US since 1973. The X-59's uniquely shaped long nose and carefully designed airframe spread the shockwaves so they don't coalesce into a single loud boom. If successful, NASA's data could convince regulators to lift the overland ban, opening the door to commercial supersonic travel that could cut a 5-hour cross-country flight to just 2.5 hours.