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The Insane Engineering of James Webb Telescope

Real Engineering · 8.8M views · 2021-12-18 · 31:12

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Overview

Real Engineering explains the engineering behind the James Webb Space Telescope, including its folding mirror, sunshield, orbit and cooling systems, and why deployment was so difficult.

On Hacker News

HN recommends it as an accessible in-depth explanation of how Webb works and why its deployment was remarkable.

Recommended by 3 HN people across 3 months · HN mentions 2021–2022

Topics

Space exploration & spaceflightMechanical & precision engineering
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jwstspace engineeringtelescope deploymentcryocoolernasa

What people said

ResNet · 2022-04 · Recommendation

The fact that the telescope's cryocooler is acoustically symmetrical such that any vibrations made by each cylinder, and the actual flow of gas, is near-perfectly cancelled out is nothing short of amazing. [0] Real Engineering made a video that covered this and more, which is well worth a watch. [1] [0] [LINK] [1] [VIDEO] (The Insane Engineering of James Webb Telescope)

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541 · 2022-01 · Recommendation

For some context around what makes this deployment so remarkable, watch this[0] video that talks about the engineering/building aspects of the James Webb [0] [VIDEO]

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y4mi · 2021-12 · Recommendation

If you're interested in a more indepth view of how it's supposed to work, Real Engineering did a video about it recently. No idea if what they're saying is true however, I've no knowledge about the domain. [VIDEO]

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Sources

Video by Real Engineering, played through YouTube.

Data and selection notes

HN summaries and labels may contain AI errors. HN dates refer to discussions, not video publication.

HN Library: HackerTube export (2026-10-31) and open-index/hacker-news. Upstream summaries and classifications may contain AI errors.

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