The flight is scheduled to launch from Spaceport America in the New Mexico desert, with two Italian Air Force officers and an engineer with the National Research Council of Italy focusing on a series of microgravity experiments during their few minutes of weightless.

One will wear a special suit that measures biometric data and physiological responses while another will conduct tests using sensors to track heart rate, brain function and other metrics while in microgravity. The third will be studying how certain liquids and solids mix in that very weak gravity.

Virgin Galactic will be live-streaming the flight on its website.

Next up for Virgin Galactic will be the first of hundreds of ticket holders, many who have been waiting years for their chance at weightlessness and to see the curvature of the Earth. Those commercial flights are expected to begin in August and will be scheduled monthly, the space tourism company said.

Virgin Galactic has been working for years to send paying passengers on short space trips and in 2021 finally won the federal government’s approval. The company completed its final test fight in May.

The Italian research flight was initially scheduled for the fall of 2021 but Virgin Galactic at the time said it was forced to push back its timeline due to a potential defect in a component used in its flight control system. Then the company spent months upgrading its rocket ship before resuming testing in early 2023.

After reaching an altitude of nearly 50,000 feet (15,000 meters), Virgin Galactic’s space plane is released from a carrier aircraft and drops for a moment before igniting its rocket motor. The rocket shuts off once it reaches space, leaving passengers weight before the ship then glides back to the runway at Spaceport America.

Virgin Galactic has sold about 800 tickets over the past decade, with the initial batch going for $200,000 each. Tickets now cost $450,000 per person.

The company said early fliers have already received their seat assignments.