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Webb's mirrors were built to withstand micrometeoroids, which are unavoidable in space. In May, a dust-sized hit was larger than tested for. After careful analysis, we've found it to be a rare statistical event. Webb’s optical performance remains twice as good as requirements. ⬇️ #JamesWebb
in reply to NASA

Aren’t they partially avoidable if you have a long telescope tube like Hubble instead of a largely unshielded primary mirror like Webb?
in reply to NASA

This is an amazing project with untold knowledge waiting to be discovered.

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