The Universe, Unfolded: NASA Webb Space Telescope
summary
Overview of what was actually done and what worked: Webb deploys to L2 (1.5 million km), cools the cold side to ~40 K while the hot side runs near 400 K, and unfolds a 6 m, tennis‑court‑size observatory with 18 mirror segments actuated for alignment. Commissioning runs seven phases across about three months: segment identification, stacking, three rounds each of coarse phasing (dispersed fringe sensing) and fine phasing using NIRCam defocus, achieving segment co-phasing to roughly 50 nanometers. Near‑ and mid‑IR instruments produce the first deep field (12.5 hr exposures quoted for some composites) and successful spectroscopy of exoplanet atmospheres.
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chapters (16)
- 0:00Intro
- 1:51James Webb Space Telescope
- 6:00Webb's science instruments
- 8:09Why study infrared light?
- 16:55Segment alignment
- 20:14Coarse phasing
- 21:37Fine phasing
- 23:32Telescope alignment
- 26:07Webb's first deep field
- 30:24Exoplanet
- 33:46Planetary nebula
- 34:39Stephan's Quintet
- 35:38Wolf-Rayet Star
- 37:20Carina nebula
- 39:58Share knowledge
- 40:40Outro
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