Comments by "Michael Deierhoi" (@michaeldeierhoi4096) on "James Webb Just Turned On Its Camera To Look At Its First Target" video.

  1. A minor issue. L2 is a remote place in space and though it will encounter micrometeors they are not thought to plan a significant role in the life of the JW. Expected to be as much as 20 years.
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  2. Actually NASA has gone to the greatest lengths to make sure that the JW functioned properly. The hardest part was probably the sun shield deployment which was practiced by the assembly team many times to work out all of the potential bugs. And it did indeed deploy as planned. This is an unavoidable of increasingly complex technology that is operated completely remotely which NASA has gotten quite good at with previous telescopes.
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  3. No it doesn't mean that at all. At absolute 0 there is a complete cessation of movement at the atomic level. Thus as atomic activity increases so to does the measured temperature increase. The temperature in MIRI vs the NIRCAM must be significantly lower because it is seeing infrared light at a longer wavelength thus less heat energy is created. And the ambient temperature in the MIRI or Midinfrared Instrument must be BELOW that of interstellar space to detect that midrange infrared light. I hope that makes it more clear. It can be confusing to understand
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  4.  @theinspector7882  Time does not necessarily indicate motion. And I'm not sure what change you referring to in this context. The MIRI on the JW is kept at --267 °C through the use of super cooled helium flowing through the instrument. This reduces any heat in the system which in turn slows any motion to virtually zero. Since the instrument is artificially kept so cold there is no movement and thus no change over time and no heat produced which could effect the instrument's function.
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  5. Except that is extremely unlikely to happen because the age of universe was first nailed down over 20 years ago and has even gotten more refined in recent years.
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  6.  @HB-mn8lh  You mean L2 and the JW arrived there a few days ago. But it will take a while to align the mirrors and to cool the instruments to their working temperature.
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  7. Sorry, that's not on the planned agenda. But you can go ahead and imagine it.
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  8. The JW will not be able to directly image a planet's surface, but it will see the planet transit a star with better resolution and to read the chemistry of the atmosphere which we can't do at all with current instruments. . At least that is what is hoped for.
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