Timeline for Why is JWST parked in sunlight, rather than using a nuclear battery?
Current License: CC BY-SA 4.0
11 events
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| Dec 30, 2021 at 10:22 | comment | added | fraxinus | It cannot "pass" more than 50%, except by being transparent. And thansparent the solar panel is not (except maybe partially in x-ray and partially in longer than cm-scale radio waves) | |
| S Dec 29, 2021 at 18:15 | history | edited | Fred | CC BY-SA 4.0 |
Copy edited (e.g. ref. <https://en.wikipedia.org/wiki/Kelvin> and <https://en.wikipedia.org/wiki/NASA>). Better not use questions in answers (this is not a forum - ref. <http://meta.stackexchange.com/a/92115>) - there are other ways to express the same.
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| S Dec 29, 2021 at 18:15 | history | suggested | Peter Mortensen | CC BY-SA 4.0 |
Copy edited (e.g. ref. <https://en.wikipedia.org/wiki/Kelvin> and <https://en.wikipedia.org/wiki/NASA>). Better not use questions in answers (this is not a forum - ref. <http://meta.stackexchange.com/a/92115>) - there are other ways to express the same.
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| Dec 29, 2021 at 15:16 | review | Suggested edits | |||
| S Dec 29, 2021 at 18:15 | |||||
| Dec 28, 2021 at 16:24 | history | edited | Roland | CC BY-SA 4.0 |
nasa refs
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| Dec 28, 2021 at 16:06 | comment | added | Roland | @SolomonSlow Right. When you think about it, a solar panel may just pass half of the 70 % of not-absorbed radiation, especially the infrared part, to the spacecraft sitting in its "shade". The other half radiates back to the sun. | |
| Dec 28, 2021 at 15:32 | comment | added | Solomon Slow | Re, "panels are black to absorb sunlight..." The best commercially available PV modules are around 30% efficient. They get hot when they absorb sunlight. Put your hand on a solar panel that's been soaking up full sun for half a day, and you'll see. And, that's on Earth where air carries a lot of heat away. In vacuum, the panels will only be cooled by radiation, and some of that will be directed toward the rest of the spacecraft. So sure, PV panels provide significant shade, but it's not cold-darkness-of-space shade. | |
| S Dec 28, 2021 at 14:19 | review | First answers | |||
| Dec 28, 2021 at 15:41 | |||||
| S Dec 28, 2021 at 14:19 | history | edited | Roland | CC BY-SA 4.0 |
details
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| S Dec 28, 2021 at 13:25 | review | First answers | |||
| Dec 28, 2021 at 14:15 | |||||
| S Dec 28, 2021 at 13:25 | history | answered | Roland | CC BY-SA 4.0 |