The heavy version of Europe's Ariane 6 rocket launched for the first time Thursday, hauling 32 spacecraft to low-Earth orbit for Amazon's satellite broadband constellation.

The Ariane 6 rocket lifted off from the Guiana Space Center on the northeastern coast of South America at 11:45 am EST (16:45 UTC), quickly soaring into a clear sky at the tropical spaceport on the power of a hydrogen-fueled main engine and four strap-on solid rocket boosters.

This Ariane 6 configuration, called Ariane 64, is the first to use the rocket's full complement of four boosters. Collectively, the rocket generated more than 3.4 million pounds of thrust (15,400 kilonewtons) of thrust as it steered northeast over the Atlantic Ocean. Less than two hours later, the rocket's upper stage released all 32 of Amazon's satellites into an on-target orbit at an altitude of 289 miles (465 kilometers).

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The upgraded Super Heavy booster slated to launch SpaceX's next Starship flight has completed cryogenic proof testing, clearing a hurdle that resulted in the destruction of the company's previous booster.

SpaceX announced the milestone in a social media post Tuesday: "Cryoproof operations complete for the first time with a Super Heavy V3 booster. This multi-day campaign tested the booster's redesigned propellant systems and its structural strength."

Ground teams at Starbase, Texas, rolled the 237-foot-tall (72.3-meter) stainless-steel booster out of its factory and transported it a few miles away to Massey's Test Site last week. The test crew first performed a pressure test on the rocket at ambient temperatures, then loaded super-cold liquid nitrogen into the rocket four times over six days, putting the booster through repeated thermal and pressurization cycles. The nitrogen is a stand-in for the cryogenic methane and liquid oxygen that will fill the booster's propellant tanks on launch day.

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