Launch of ESA’s Celeste mission 1
At 10:14 CET on 28 March 2026, the European Space Agency lifted off the first two satellites of its Celeste LEO‑PNT in‑orbit demonstration mission from the Rocket Lab launch complex at Māhia, New Zealand, using a Rocket Lab Electron launch vehicle. The launch marked the inaugural flight of Europe’s Celeste programme, which seeks to place satellite navigation capability in low Earth orbit. The two spacecraft entered a low‑Earth‑orbit trajectory after a successful separation sequence, initiating the first operational test of the Celeste concept.
Celeste is designed to evaluate next‑generation positioning, navigation and timing (PNT) technologies and to validate new frequency bands that have not been used for satellite navigation before. By operating in low Earth orbit, the pair of satellites will provide a complementary layer to the existing Galileo constellation that resides in medium Earth orbit, with the aim of increasing overall system resilience, improving positioning accuracy, and supporting additional navigation‑related services. The mission’s technical objectives include demonstrating inter‑satellite links, assessing signal integrity in the LEO environment, and gathering performance data that can inform future European navigation architectures.
The Celeste launch positions Europe to expand its autonomous navigation capabilities beyond the Galileo system, aligning with a broader industry shift toward leveraging low‑Earth‑orbit assets for global navigation. Successful validation of the Celeste technology could lead to a larger constellation that augments Galileo, offering redundancy and enhanced service continuity for users worldwide. The demonstration also underscores collaboration between ESA and commercial launch providers such as Rocket Lab, reflecting an increasing reliance on private launch services for European space initiatives.
