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It took like 5 months to cool web to operational temperatures rolling the telescope would create so much heat all new images would be useless until it cools dow
by AnonMO 4y ago
It took like 5 months to cool web to operational temperatures rolling the telescope would create so much heat all new images would be useless until it cools down again.
- moffkalast 4y agoThat makes no sense, they have to rotate it every time they take a picture otherwise they'd be looking at the same spot all the time. Motors don't emit that much heat and neither do torque wheels. Though I suppose now that I think of it, it's possible the main mirror assembly actually has no built in roll control but only pitch, since the yaw part could be done by moving the entire telescope while remaining shaded. I've never seen any videos showing the full movement, but the previews for LUVIOR show it having full 3 degree articulation relative to the heatsink segment, so I assumed the Webb also has it given that they're extremely similar designs. https://www.youtube.com/watch?v=uzFEaCYhmEs https://www.youtube.com/watch?v=uzFEaCYhmEs
- AnonMO 4y agoLUVIOR is not web. Web doesn't have articulation like LUVIOR its fixed only the mirror segements move. also they don't rorate everytime they take a picture there's limitations beacuse its an infered telescope. https://jwst-docs.stsci.edu/jwst-observatory-characteristics/jwst-observatory-coordinate-system-and-field-of-regard https://jwst-docs.stsci.edu/jwst-observatory-characteristics.... Web also has a field of view 15x hubble
- akira2501 4y ago> otherwise they'd be looking at the same spot all the time It's in an orbit around L2, so it's not statically positioned in space. L2 also moves with the earth around the Sun, so it's not statically limited to any one region of the sky.