SpaceX’s Version 3 (V3) Starship launches on its debut suborbital test flight on Friday. Credit: SpaceX Ahead of what observers anticipate will be the largest initial public offering (IPO) in history, SpaceX debuted its largest rocket yet on a mostly successful mission. Though Starship and the Super Heavy booster — which combined stand more than 400 feet (122 meters) tall, nearly the length of a Boeing 777 — suffered multiple engine failures, the ship achieved its planned suborbital trajectory and deployed a batch of dummy Starlink satellites. For the first time, two of these used cameras and sensors to scan Starship in space. The ship’s flaps and heat shield also appeared to fare better during the extreme conditions of atmospheric reentry than they have on previous test flights.…