[HN Gopher] Webb discovers new feature in Jupiter's atmosphere
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Webb discovers new feature in Jupiter's atmosphere
Author : PaulHoule
Score : 52 points
Date : 2023-10-28 14:20 UTC (8 hours ago)
(HTM) web link (phys.org)
(TXT) w3m dump (phys.org)
| ck2 wrote:
| What I really want to see is the JWST images of Sedna
|
| Hubble can only produce one pixel
|
| https://esahubble.org/images/opo0414d/
|
| Apparently JWST was pointed at it a year ago but all they
| released was an image-less paper on the spectrum?
|
| BTW you know the "deep field" image they use for testing?
|
| I have a new favorite instead. "Abel 2218" just look at that.
|
| https://en.wikipedia.org/wiki/Abell_2218
| n40487171 wrote:
| Spectrometers don't always make "images", it's possible they
| didn't take a picture?
|
| Also, that deep field has some amazing gravitational lenses!
| floxy wrote:
| While the JWST has a larger aperture (6.5 m) than Hubble (2.7
| m), the wave lengths it is sensitive to are also longer. So the
| overall resolution is only between 2 and 3 times better for
| JWST. So if Hubble can only resolve something to 1 pixel, I'd
| only expect you'd get at most 9 pixels for JWST.
| HPsquared wrote:
| Makes sense that Jupiter would also have jet streams.
| eimrine wrote:
| Can Webb be used for military purposes (observing Earth)?
| mkwarman wrote:
| No, due to heat reasons:
|
| https://webb.nasa.gov/content/about/faqs/faqLite.html#:~:tex...
| .
|
| https://webb.nasa.gov/content/forScientists/faqSolarsystem.h...
| feoren wrote:
| No, it can't be pointed at the inner solar system or Earth; too
| bright, and its heat shield would point the wrong way.
|
| But the military doesn't need it. Supposedly some military tech
| was declassified recently showing that the military had Hubble-
| level telescopes about 15 years before Hubble. So whatever they
| are using is much better (and more specialized, of course) than
| Webb.
| wredue wrote:
| Not sure the technology needed is quite the same.
|
| They probably have better up there, but we know that military
| satellites are able to see the individual poles in a chain
| link fence crisply due to Trump leaking that capability a few
| years ago on twitter.
| euroderf wrote:
| Sure, the military had the test rig to pre-flight test
| Hubble's optics, except that someone slipped up and well
| dang, Hubble needed corrective lenses.
| eep_social wrote:
| Here's an article from 2012 describing the military donating
| _two_ unlaunched hubble-class telescopes to NASA:
| https://newatlas.com/spysatellite/22813/
| mathstuf wrote:
| Webb can only point away from Earth as the Sun is on the other
| side of Earth from Webb's location. All it would see is a
| bright source of IR; nothing much useful there. I'm afraid it
| would also likely be destroyed in the process as it is assuming
| near-absolute-zero temperatures for much of its instruments.
| gustavus wrote:
| An exhaustive, through and entertaining answer to that question
| (for the bubble) is provided here
|
| https://what-if.xkcd.com/32/
|
| The short answer is not really and drones are better for it
| anyway.
| anigbrowl wrote:
| Much of _The Algebraicist_ by Iain M Banks is about navigating
| the environment on a gas giant. Not part of his 'Culture' sci-fi
| setting and perhaps more re-readable for that.
| Loughla wrote:
| >Not part of his 'Culture' sci-fi setting and perhaps more re-
| readable for that.
|
| BOOOOOOOOOOOO.
|
| But in all seriousness, as someone who genuinely re-reads the
| culture series at least once a year, do you not find them re-
| readable? And why not?
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(page generated 2023-10-28 23:01 UTC)