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James Webb telescope...

Webb’s Jupiter Images Showcase Auroras, Hazes

JWST-2022-07-27-Jupiter.png


https://blogs.nasa.gov/webb/2022/08/22/webbs-jupiter-images-showcase-auroras-hazes/
 
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Astronomy

Neptune and its rings shown in striking new light by Webb telescope

Farthest planet from sun and its satellites revealed in unprecedented detail by space telescope’s infrared imager

https://www.theguardian.com/science...shown-in-striking-new-light-by-webb-telescope

Extract...

Because Triton orbits the wrong way around Neptune, it is believed to have once been an object from the nearby Kuiper belt which was captured in the planet’s orbit. “So it’s pretty cool to go and have a look at,” said McCaughrean.
 
This wider James Webb photo is cool, too.

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The smudges are galaxies (each with a bazillion stars), the star crosses are stars in our own galaxy, and the thing with a ring is not the usual thing with a ring you see when looking at planets closer to home.

Joe
 
Tangentially related ... if you have decent binoculars or, better yet, a good telescope, take a boo at Jupiter over the next couple of evenings. It will not be this close again in your lifetime, unless you're very young. And let's face it, if you're a member of pfm and recall fondly the time you queued up to buy a Steely Dan LP when it was originally released you likely ain't.

https://www.space.com/jupiter-at-its-best-opposition-sept-2022

Joe
 
Joe P said:
This wider James Webb photo is cool, too.

FdLZhtoWYAAnhPN


The smudges are galaxies (each with a bazillion stars), the star crosses are stars in our own galaxy, and the thing with a ring is not the usual thing with a ring you see when looking at planets closer to home.

Joe
Click to expand...
While we’re on the subject, why do stars show up as spikey? I used to think it was a lens aberration, but now I’m not so sure? Refraction?
I feel I ought to know, being familiar with lower frequency wave theory, but hmmmm
 
Nero,

I was going to say that one of the James Webb telescope engineers is a huge fan of 1970s-style star-cross filters like you might see in an Elvis special beamed from Las Vegas. You know the kind of filter. It turned every sequin, rhinestone and ruby on the jumpsuit into a star.

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But, alas, the answer is more prosaic — the spikes are diffraction bursts.

https://universemagazine.com/en/why-do-the-stars-look-spiky-in-james-webbs-photos/

Joe
 
Joe P said:
Tangentially related ... if you have decent binoculars or, better yet, a good telescope, take a boo at Jupiter over the next couple of evenings. It will not be this close again in your lifetime, unless you're very young. And let's face it, if you're a member of pfm and recall fondly the time you queued up to buy a Steely Dan LP when it was originally released you likely ain't.

https://www.space.com/jupiter-at-its-best-opposition-sept-2022

Joe
Click to expand...

The late afternoon and evening were very cloudy with the remnants of a weather front passing over NW England, but the sky cleared about an hour ago into one of the clearest and darkest night skies I’ve seen for a while. Super views of Jupiter, with three bands, a pole and three moons clearly visible through a 4” refractor. Saturn also putting on a very good show, and I’m reasonably sure that I was able to see Neptune as well (a small and faint blueish disc). Not bad!
 
The sky is rapidly clouding over now, but the views of Jupiter and the four Galilean moons have been excellent for the last couple of hours. And right overhead, M31 or the Andromeda galaxy, has also put on a great show this evening.
 
I was able to take a quick peak at Jupiter the night before last. Even at relatively low magnification (about x80) Jupiter was huge and phenomenally bright, to the extent I had to use a filter to tone it down. Unfortunately, there was far too much turbulence to be able to see much surface detail beyond the main bands. Yesterday was cloudy, and today is really windy, so not too optimistic for tonight. Grrrr.
 
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