When SpaceX’s giant Starship rocket exploded over the Caribbean last year, the internet lit up with videos from airline passengers, island tourists and locals showing flaming debris shooting across the sky. Even some airline pilots recorded the fiery aftermath as planes scrambled to move out of its path.

Some of those videos of Starship’s seventh test flight — including ones taken from Disney and Royal Caribbean cruise ships and a Club Med resort — went on to play a role in the company’s efforts to count and track pieces of debris after the explosion, a report obtained by ProPublica says.

The report — obtained by ProPublica from the Federal Aviation Administration through a freedom of information request — shows video captured a fireball, then a shower of sparkling debris in the sky moments after the explosion. It includes maps pinpointing where the images were shot, which helped the company understand how debris tumbled to earth after the blast.

“At 1 minute 42 seconds, the debris cloud is observed transiting behind the cruise ship,” says the report, which SpaceX provided the FAA two weeks after the so-called mishap.

Such reports are required by federal rules in the days after a rocket failure and are supposed to describe what happened and where hazardous debris landed. The information is key for the FAA’s efforts to keep busy air traffic corridors safe at a time of rapid growth in the commercial space industry as companies like SpaceX develop and test rockets that they hope will eventually reach the moon and Mars.

During launches, the FAA preventively closes airspace. It has also been........

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