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Astronomy & science · first seen 30 Aug, updated 30 Aug

Before JWST began science operations, a dust-sized particle struck one segment of its 6.5-metre mirror at hypervelocity and left an uncorrectable deformation — damage revealed because Webb can detect nanometre-scale changes in its own optical surface.

1 outlet James Webb Space Telescope

Webb detected a permanent deformation on mirror segment C3 through nanometre-scale wavefront sensing, corrected part of it and remained well inside requirements. The post Before JWST began science operations, a dust-sized particle struck on…

Summary from SpaceDaily.

Coverage 1 article · 1 outlet

  1. SpaceDaily
    Before JWST began science operations, a dust-sized particle struck one segment of its 6.5-metre mirror at hypervelocity and left an uncorrectable deformation — damage revealed because Webb can detect nanometre-scale changes in its own optical surface.