NEW YORK - SpaceX delayed a critical test of its massive Starship rocket on July 16, citing an unspecified problem.Starship was slated to take off on its 13th major mission from SpaceX’s South Texas launch facility, called Starbase, at 5.45pm local time.“We’ll dig in with the teams, figure out what happened, and figure out when our next attempt is going to be,” said Dan Huot, communications manager at SpaceX.The Starship test is the rocket’s first since SpaceX’s blockbuster initial public offering in June that raised some US$86 billion (S$111 billion).Shares of SpaceX fell 3.1 per cent postmarket after closing down in regular trading on July 16. The stock soared shortly after the company’s IPO but more recently has slumped. Despite the decline, Wall Street analysts still remain largely bullish on the stock. The rocket is central to Musk’s ambitions to put data centres in space, expand the Starlink communications network and send humans to the moon and Mars. But it has faced a rocky development path marred by explosive setbacks, malfunctions and delays.Musk’s company has designed Starship to be fully reusable, something no other rocket maker has achieved, with both the Super Heavy booster and the Starship spacecraft intended to return to Earth intact after each launch so they can fly to space again. BLOOMBERG