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Smile mission launch countdown

April 5, 2026ESA Science

ESA Science posts T-5 and T-4 day updates for Smile, describing deployment and orbit-raising to a polar science orbit. Multiple posts emphasize joining the live launch on April 9.

It's T-5️⃣ days until the Smile launch
join us on 9 April!
T-4️⃣ days until Vega-C will bring Smile into an almost-circular orbit around Earth’s poles.
reach its final science orbit, which will bring the satellite to 121 000 km above the North Pole
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