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Smile is a brand-new space mission currently in the making. It will study how Earth responds to the solar wind and solar storms.

At the European Space Agency’s technical heart in the Netherlands, engineers have spent the last four months carrying out ‘spacecraft environment testing’ – putting Smile through its paces to make sure it is ready for the shaky rocket launch, the vacuum of space and the extreme temperatures it will face in orbit around Earth.

Now all complete, Smile is one step closer to launch in 2026.

This video provides a glimpse into the testing process. It

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