For 32 days, the Smile spacecraft climbed quietly through the void. On June 20, 2026, it arrived at its new home: a highly elliptical orbit that swings it 120,920 kilometers above Earth's North Pole before swooping down to just 5,027 kilometers above the South Pole. The journey was hardly a straight line—Smile fired its main engine 12 times to carve out this unusual path, 11 burns to climb over the North Pole and one final push to clear the South. Now, after years of preparation and months of delicate maneuvering, the European-Chinese mission can finally begin its work.
The destination matters enormously. Smile will study Earth's magnetosphere, the invisible magnetic bubble that shields the planet from the constant stream of charged particles streaming off the sun. When those particles collide with the magnetosphere, they spark the auroras—those shimmering curtains of light that dance across polar skies. Smile's instruments will capture that interaction in unprecedented detail, helping scientists understand a phenomenon that has captivated humanity for millennia.
The spacecraft itself appears to be in excellent health. Its engine performed better than expected during the ascent, leaving behind roughly 164 kilograms of propellant—fuel that could extend the mission well beyond its initial three-year plan. "The spacecraft is in excellent condition, with the engine performing better than expected," the team reported. That surplus propellant represents something rare in space exploration: a gift of time.
The collaboration behind Smile reflects a rare spirit of international partnership. The Chinese Academy of Sciences leads operations from Beijing, while the European Space Agency supported every day of the orbit maneuver phase, coordinating with ground stations in French Guiana and Antarctica as Smile passed overhead. ESA experts have now traveled to Beijing to join their colleagues for the commissioning campaign, a two-month process of switching on and calibrating the spacecraft's suite of science instruments. That work will continue through the end of August, with real scientific observations set to begin in September.
Smile's ESA project manager, David Agnolon, captured the mood among the team with a simple phrase: "Everyone keeps on Smile-ing!" It's a pun that feels earned—32 days of careful navigation, 12 engine burns, and one spacecraft now positioned to unlock new understanding of our planet's protective magnetic shield. The real science, as the team calls it, is just around the corner.