Stay up late tonight to watch Europe's Ariane 6 rocket launch its 1st pair of Galileo navigation satellites

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Europe's towering Ariane 6 rocket is gaining momentum in the heavy-lift launch market as the vehicle gears up for its fifth flight.

a white rocket launches into an evening sky

An Arianespace Ariane 6 rocket launches the Sentinel-1D Earth-observation satellite from French Guiana on Nov. 4, 2025. (Image credit: Arianespace)

The L14 satellites are scheduled to deploy about 3 hours and 20 minutes after liftoff and will then spend three days unfolding their solar arrays and running checks on critical systems. The two satellites will then enter a four-month drift and positioning phase before settling into their final orbital position to begin operation.

The Galileo constellation circles Earth at an altitude of 14,429 miles (23,222 kilometers). To date, most of the 1,610-pound (730 kilograms) spacecraft have been launched aboard Europe's Ariane 5, which retired in 2023, or the Russian-built Soyuz rocket, an arrangement that Europe ended following Russia's invasion of Ukraine in February 2022.

Europe tapped SpaceX's Falcon 9 to fly Galileo satellites after the invasion, but now that Ariane 6 is operational, the continent can loft those missions without depending on outside launch providers.

This will be the fifth-ever launch of the Ariane 6, which completed four successful flights over the past year, with its most recent lifting off just over a month ago.

Josh Dinner
Staff Writer, Spaceflight

Josh Dinner is the Staff Writer for Spaceflight at Space.com. He is a writer and photographer with a passion for science and space exploration, and has been working the space beat since 2016. Josh has covered the evolution of NASA's commercial spaceflight partnerships and crewed missions from the Space Coast, as well as NASA science missions and more. He also enjoys building 1:144-scale model rockets and human-flown spacecraft. Find some of Josh's launch photography on Instagram and his website, and follow him on X, where he mostly posts in haiku.

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