The secondary mirror of Rubin Observatory is lowered into final position on the telescope, as viewed from the other end of the telescope through the light-dispersing baffle for the primary mirror. The baffle forms a black circular border around the image. The secondary mirror supports form an X in the background with a teal ring in the center where the mirror will go. The mirror with its metal cover is just above the teal ring. Walkway platforms bisect the view from the left and right.
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