NASAのインスタグラム(nasagoddard) - 12月13日 06時34分

This is the James Webb Space Telescope's ETU (engineering test unit) primary mirror segment returning to the cleanroom at NASA Goddard after undergoing some tests at our new Calibration, Integration, and Alignment Facility (CIAF). Credit: NASA/Goddard/Chris Gunn #nasagoddard #jwst

[BIHAKUEN]UVシールド(UVShield)

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