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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://astrodon.social/users/kellylepo/statuses/113145253736228423">Kelly Lepo (kellylepo@astrodon.social)'s status on Tuesday, 24-Sep-2024 08:11:19 JST</a><a href="https://astrodon.social/@kellylepo" title="kellylepo@astrodon.social"><img src="https://gnusocial.jp/avatar/28639-48-20221116180105.webp" width="48" height="48" alt="Kelly Lepo" style="position: absolute; left: 0; top: 0;">Kelly Lepo</a><div><a href="https://astrodon.social/@kellylepo/113140667971766588" rel="in-reply-to">in reply to</a></div></section><article><p>Video of the Keck II telescope moving inside of the dome.</p><p>The primary mirror is made of 36 1.8-meter-wide hexagonal segments that work together to form one 10-meter-diameter mirror. The Keck telescopes were the first segmented mirrors used in a professional observatory. This design concept was later used for JWST.</p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/3716265#notice-7278448">In conversation</a><time datetime="2024-09-24T08:11:19+09:00" title="Tuesday, 24-Sep-2024 08:11:19 JST">about 2 months ago</time> <span>from <span><a href="https://astrodon.social/@kellylepo/113145253736228423" rel="external" title="Sent from astrodon.social via ActivityPub">astrodon.social</a></span></span><a href="https://astrodon.social/@kellylepo/113145253736228423">permalink</a><h4>Attachments</h4><ol><li><label><a rel="external" href="https://gnusocial.jp/attachment/3212606">Video begins with the back side of the Keck telescope mirror, with a support structure made of metal triangles and hexagons. The telescope slowly moves down and to the right, revealing the edge of the backplane of the telescope's hexagon-shaped mirrors. The telescope's round secondary mirror, held by supports in front of the primary mirror, is visible in the upper left. The telescope continues to rotate and a white structure, housing the adaptive optics, blocks most of the view. Camera pans up to the dome and the secondary mirror. Eventually, the front of the enormous primary mirror rotates into view. The camera pans over to a tube-like, silver instrument beside the telescope, then back to the primary mirror. The mirror is made of 36 hexagonal segments and is 10 meters in diameter. Jutting out of the center of the mirror is a large silver cone, a baffle that blocks stray light from entering the hole at the center of the mirror.</a></label><br><video poster="" controls="controls"><source src="https://cdn.masto.host/astrodonsocial/media_attachments/files/113/140/820/519/603/912/original/da942137bd7179c4.mp4" type="video/mp4"></source></video></li></ol></footer></blockquote>

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Kelly Lepo (kellylepo@astrodon.social)'s status on Tuesday, 24-Sep-2024 08:11:19 JST Kelly Lepo
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Video of the Keck II telescope moving inside of the dome.
The primary mirror is made of 36 1.8-meter-wide hexagonal segments that work together to form one 10-meter-diameter mirror. The Keck telescopes were the first segmented mirrors used in a professional observatory. This design concept was later used for JWST.
In conversationabout 2 months ago from astrodon.socialpermalink
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1. Video begins with the back side of the Keck telescope mirror, with a support structure made of metal triangles and hexagons. The telescope slowly moves down and to the right, revealing the edge of the backplane of the telescope's hexagon-shaped mirrors. The telescope's round secondary mirror, held by supports in front of the primary mirror, is visible in the upper left. The telescope continues to rotate and a white structure, housing the adaptive optics, blocks most of the view. Camera pans up to the dome and the secondary mirror. Eventually, the front of the enormous primary mirror rotates into view. The camera pans over to a tube-like, silver instrument beside the telescope, then back to the primary mirror. The mirror is made of 36 hexagonal segments and is 10 meters in diameter. Jutting out of the center of the mirror is a large silver cone, a baffle that blocks stray light from entering the hole at the center of the mirror.

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