NASA used specialized Schlieren photography to capture an image of Boom Supersonic's XB-1 demonstrator aircraft breaking the sound barrier on February 10, 2025 and producing shock waves as it exceeded Mach 1. The flight produced no audible sonic boom, marking progress toward the goal of quiet supersonic travel. CNN reports: "This image makes the invisible visible," said Blake Scholl, founder and CEO of Boom Supersonic, in a press release. In order to capture the Schlieren images, Boom chief test pilot Tristan "Geppetto" Brandenburg positioned XB-1 at an exact time in a precise location over the Mojave Desert.

As the aircraft flew in front of the sun, NASA's team documented the changing air speeds as speeds over Mach 1, the speed of sound (761.23 miles per hour or 1,225.1 kilometers per hour). The images were captured during ground telescopes with special filters that detect air distortions. You can view the photo here.

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