On September 6, the first alpha rocket of the American space company firefly Aerospace exploded on the way. The company released a new video on Sunday local time, revealing more details of the accident. Firefly Aerospace said: "although the rocket failed to enter orbit, this day marks significant progress in our team's work."“ We have confirmed that we have become a company capable of building and launching rockets. " < p > < / P > < p > at 9:59 p.m. last Thursday, the two-stage rocket alpha launched with a satellite from the Vandenberg space force base in California. This is the first launch mission of firefly space. Two minutes after liftoff, the rocket began to tilt horizontally < p > according to firefly aerospace, the rocket successfully lifted off from the launch pad, but after about 15 seconds of flight, engine 2 was shut down. Firefly Aerospace said the rocket continued to climb upward and remained under control for about 145 seconds. Because one of the four engines failed, the rocket climbed slowly < p > firefly Aerospace said, "in the absence of thrust from the No. 2 engine, the rocket faces challenges in how to maintain control. Alpha rocket can carry out thrust compensation in subsonic flight, but when it passes through transonic flight and enters supersonic flight phase, how to control the rocket is the most challenging. The lack of thrust provided by the three engines eventually led to the loss of control of the rocket. " The company added, "this state enabled ground controllers to use the flight termination system (FTS) to end the flight through an air explosion. The rocket didn't explode by itself. " < p > firefly aerospace is investigating the reason for the early shutdown of engine 2 and said that once the investigation is completed, the root cause will be reported. "With the help of FAA and partners, we will start the second flight of alpha rocket as soon as possible," the company said（ Chen Chen) < / P > < p >