On July 5th, 2026, humanity crossed a quiet but consequential threshold: a Japanese spacecraft, hurtling through the void at nearly 19,000 kilometers per hour, fired a laser at an asteroid and caught the light that came back. JAXA's Hayabusa2, on an extended mission to asteroid Torifune, completed the first-ever laser ranging experiment during an asteroid flyby — a feat of precision that required hitting a target no wider than a small house from tens of kilometers away, in a window measured in seconds. The achievement matters not only as a triumph of engineering, but because knowing exactly wh