Blue Origin’s biggest rocket was supposed to fire its engines while locked to the ground. Instead, the test ended in a fireball. The company’s New Glenn rocket exploded Thursday night at Cape Canaveral Space Force Station in Florida during a prelaunch ground test, creating a blast seen from miles away and felt by nearby residents. Jeff Bezos called it a “very rough day,” while Blue Origin began sorting through what failed and what survived. A ground test turned catastrophic The test was meant to be controlled. New Glenn remained secured to the launchpad while its first-stage engines fired, a standard prelaunch check to verify systems before flight. Instead, flames appeared near the base of the rocket as the engines ignited. Within moments, the fire spread up the vehicle, giving way to a much larger blast. Blue Origin kept its statement brief: “We experienced an anomaly during today’s hotfire test. All personnel have been accounted for.” No injuries were reported, but the cause was not immediately known.…