You know the story about IR cameras that can see through clothes, it is mostly a myth but there is some truth to it as some clothes are transparent in infrared.
Same idea here, with the deeper IR Webb operates on, you get to see the galaxy "naked", which is great if you want to study its anatomy. But not everyone enjoys seeing naked galaxies.
It is interesting seeing past the central portion to see the complete rings on the back side. In the MIRI image, it looks like a special FX shot from some scifi where the explosion happens on a plane rather than a sphere.
I thought the same about an old-vs-new comparison of the classic Pillars of Creation image, though on a second look they are both stunning in their own ways.
In the sibling photo in the index is a comparison of Hubble vs Webb.
Hubble is very brown-y, and Webb is much more blue.
But these are false colors, and they capture different light. It has to be an artistic decision to make it blue, vs brown, so does anyone here know the rationale? Is it to distinguish the different provenance? Is the color shift indicative of the captured spectrum difference? Is it a convention of the sensor? Is it a 2020s fad?
It's not arbitrary. They assign colours in order based on wavelength, so the shortest wavelengths will be bluer and the longest wavelengths will be redder.
> These images are a composite of separate exposures acquired by the James Webb Space Telescope using the MIRI instrument. Several filters were used to sample wide wavelength ranges. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are: Blue: F770W, Green: F1130W, Red: F1280W.
Chasing some numbers up, it looks like they've made the wavelengths around 20 times shorter to bring the picture into the visible spectrum.
mid near infrared vs visible light. one of the big bets with webb is that visible isn't the ideal spectrum to target. it's fantastic from a research standpoint but the pictures may seem less pleasing vs hubbles.
"Unlike the Milky Way and Andromeda galaxies, the Triangulum Galaxy does not appear to have a supermassive black hole at its center. This may be because the mass of a galaxy's central supermassive black hole correlates with the size of the galaxy's central bulge, and unlike the Milky Way and Andromeda, the Triangulum Galaxy is a pure disk galaxy with no bulge."
Triangulum is a spiral galaxy in our local group, perhaps bound to Andromeda or us.
At a rough 10 trillion kms = 1 light year,
Sombrero galaxy is 31.1 million light years away,
1 quadrillion kms = 100 light years,
1 quintillion kms = 100,000 light years,
100 quintillion km = 10 million light years,
so basically we are looking at an object 300 quintillion kms away
At this fraction of light speed 0.99999999999999999999 to the person inside the spaceship only 1.6 days will pass. But to a person on earth, it would be 31.1 million light years. Crazy eh?
Not hugely crazy, it's a function that asymptotically approaches infinity.
If you want crazy effects, IIRC the relativistic time dilation factor is also the temperature dilation factor, which means at that speed the cosmic microwave background radiation will cause positron-electron pair production in the hull of the spaceship, to a depth that is dependent on how effectively it blocks extremely hard gamna rays — like, if you're in a space suit, it will be throughout your entire body because neither the suit nor your bones are particularly opaque at that energy level.
Unrelated- but exists there a fast forward- projected position of the sky- as it would be actually toady? Like a rendered simulation without a million year timelag?
Readit News
Same idea here, with the deeper IR Webb operates on, you get to see the galaxy "naked", which is great if you want to study its anatomy. But not everyone enjoys seeing naked galaxies.
https://science.nasa.gov/mission/hubble/science/explore-the-...
It is interesting seeing past the central portion to see the complete rings on the back side. In the MIRI image, it looks like a special FX shot from some scifi where the explosion happens on a plane rather than a sphere.
https://webbtelescope.org/contents/media/images/2022/052/01G...
Hubble is very brown-y, and Webb is much more blue.
But these are false colors, and they capture different light. It has to be an artistic decision to make it blue, vs brown, so does anyone here know the rationale? Is it to distinguish the different provenance? Is the color shift indicative of the captured spectrum difference? Is it a convention of the sensor? Is it a 2020s fad?
Hubble uses visible light and I prefer this image from an artistic standpoint as it seems to capture depth better.
> These images are a composite of separate exposures acquired by the James Webb Space Telescope using the MIRI instrument. Several filters were used to sample wide wavelength ranges. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are: Blue: F770W, Green: F1130W, Red: F1280W.
Chasing some numbers up, it looks like they've made the wavelengths around 20 times shorter to bring the picture into the visible spectrum.
"Unlike the Milky Way and Andromeda galaxies, the Triangulum Galaxy does not appear to have a supermassive black hole at its center. This may be because the mass of a galaxy's central supermassive black hole correlates with the size of the galaxy's central bulge, and unlike the Milky Way and Andromeda, the Triangulum Galaxy is a pure disk galaxy with no bulge."
Triangulum is a spiral galaxy in our local group, perhaps bound to Andromeda or us.
https://en.wikipedia.org/wiki/Triangulum_Galaxy
If you want crazy effects, IIRC the relativistic time dilation factor is also the temperature dilation factor, which means at that speed the cosmic microwave background radiation will cause positron-electron pair production in the hull of the spaceship, to a depth that is dependent on how effectively it blocks extremely hard gamna rays — like, if you're in a space suit, it will be throughout your entire body because neither the suit nor your bones are particularly opaque at that energy level.
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