Posted on 08/01/2025 12:28:38 PM PDT by Red Badger
Astronomers using the NASA/ESA/CSA James Webb Space Telescope have observed the Hubble Ultra Deep Field (HUDF), an area of deep space with nearly 10,000 galaxies in the constellation Fornax.
This Webb image shows the Hubble Ultra Deep Field, an area of deep space with thousands of galaxies in various shapes and sizes on a black background. Image credit: NASA / ESA / CSA / Webb / G. Östlin / P. G. Perez-Gonzalez / J. Melinder / JADES Collaboration / M. Zamani, ESA & Webb.
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The original HUDF images were pioneering deep-field observations with Hubble published in 2004.
They probed more deeply than ever before and revealed a menagerie of galaxies dating back to less than a billion years after the Big Bang.
The area was subsequently observed many times by Hubble and other telescopes.
“The field shown here, known as the MIRI Deep Imaging Survey (MIDIS) region, was observed with the shortest-wavelength filter of Webb’s Mid-Infrared Instrument (MIRI) for nearly 100 hours,” the Webb astronomers said in a statement.
“This is Webb’s longest observation of an extragalactic field in one filter so far, producing one of the deepest views ever obtained of the Universe.”
“Combined with data from Webb’s Near-Infrared Camera (NIRCam), this image allows astronomers to explore how galaxies formed and evolved over billions of years.”
“These deep observations have revealed more than 2,500 sources in this tiny patch of sky.”
“Among them are hundreds of extremely red galaxies — some of which are likely massive, dust-obscured systems or evolved galaxies with mature stars that formed early in the Universe’s history.”
“Thanks to Webb’s sharp resolution, even at mid-infrared wavelengths, researchers can resolve the structures of many of these galaxies and study how their light is distributed, shedding light on their growth and evolution.”
In the new Webb image of HUDF, the colors that have been assigned to different kinds of infrared light highlight the fine distinctions astronomers can make with these deep data.
“Orange and red represent the longest mid-infrared wavelengths,” the astronomers said.
“The galaxies in these colors have extra features — such as high concentrations of dust, copious star formation, or an active galactic nucleus (AGN) at their center — which emit more of this farther infrared light.”
“Small, greenish-white galaxies are particularly distant, with high redshift.”
“This shifts their light spectrum into the peak mid-infrared wavelengths of the data, which are depicted in white and green.”
“Most of the galaxies in this image lack any such mid-infrared boosting features, leaving them most bright at shorter near-infrared wavelengths, which are depicted with blue and cyan colors.”
ORIGINAL HUBBLE DEEP FIELD:
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Webb & Hubble Ping!.................
That those are all galaxies is simply not fully comprehensible to me, which is part of the attraction of such otherwise “useless” images.
It’s not as if any of it is within reach or will be within a foreseeable future. To conquer space-time we probably couldn’t be corporeal.
Maybe that’s what’s to learn in the Millennium.
As a spirit-being we will be able to cross the cosmos in the blink of an eye......................
I thought this was going to be a thread about the Clintons
Whole lotta new stuff. Er, old stuff, but new to us. :^)
In trying to learn more about our universe without being able to actually explore it, we invent bigger and better means of doing such. It’s frustrating, knowing that we can look, but not touch. We’re limited by the vast distances, but our telescopes will show us much. We just have to learn to understand what we are seeing.
I clicked this link expecting news about Chelsea Clinton’s father.
Before it was the stars in the night sky.
Now it’s the galaxies. Stars arguably being “old hat” now.
Of course most of the galaxies getting all the attention are impossible to see without massive telescopes, so most of us have got to take their word for it!
The switcheroo from stars to galaxies happened quickly and very recently.
Yet what we are seeing is "were," their light having taken so long to get here. If an entire galaxy had collapsed by the time we got there, would there have been anything to "understand"? If by that time we could outrun light, where would we go to see what happened?
And so on. Most of the time, I get to feel like a bug on a rock, as if the rock was the whole world. In a way, to me it is.
Hubble bubble, soil is trouble.
There are miles of fungal fibers in a gram of soil, and perhaps millions of species, some having symbiotic relationships. It may be fun to contemplate the universe, but perhaps not at the expense of that beneath our feet.
“Awesome” is an inadequate expression for this. Thanks for the ping.
If I was dead or never born none of this would exist..
Choosing the midpoints of the data estimates, there are 200 billion stars in our galaxy...
From the JWST and Hubble data, there are, in the patch of observed sky, at least 10,000 galaxies...
So, assuming a star count of this sky patch similar to our galaxy, there are 200 billion stars in each of 10,000 galaxies...
200,000,000,000 x 10,000 = 2 x 1015 stars out there...
I'll have to get out one of my slide rules, do a hand count of the number of galaxies in the sky patch, and double-check that number...
It's interesting to keep to keep the range of that timescale in mind when looking at such images. 'When was that in this galaxy, versus that one???" It might be an interesting image technology to color-scale the differences.
The 200-inch Hale Telescope on Mt. Palomar has been observing galaxies since 1949.
But you hardly need that ...
A good 6” or larger Schmidt-Cassegrain or Maksutov-Cassegrain telescope will show you galaxies on a clear night.
It's a very small patch, about the size of a dime held at arms length.
Just out of curiosity.
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