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sMASH
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Re: Astronomy

Postby sMASH » January 11th, 2023, 10:31 am

maj. tom wrote:New Release.

JWST Advanced Deep Extragalactic Survey (JADES)

You really have to click on this link to zoom in and see some details in the image. But it shows more galaxies in a Deep Field survey than ever thought. Every single point of light (without the diffraction crosses) is a separate galaxy! There are so many redshifted that were captured which shows just how far away they were.

https://stsci-opo.org/STScI-01GKT0TT83R41FVZ9JGNWGB2AH.png




Image
Question: approx how much more galaxies, dies a jwst deep feild show, compared to the most detailed hubble?

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Re: Astronomy

Postby maj. tom » January 11th, 2023, 10:42 am

They're still counting all this data is so new. But it's not really how many more it can now see within the same area, but rather how much further back in time the different telescopes can capture the redshifted energy from then to here and now.

Image


There is a limit to how far back any device can capture because eventually it hits the microwave length red shifted wall of the Cosmic Microwave Background CMB which looks like this in every direction:

Image

Which you can actually see and hear as white static on old timey radios and tv.
Last edited by maj. tom on January 11th, 2023, 10:51 am, edited 1 time in total.

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Re: Astronomy

Postby sMASH » January 11th, 2023, 10:48 am

Well, the hubble wouldn't see as many red shifted ones as the jwst. So in that shell of time, I want to know how many more does it detect there...
It's not just looking back in time, it's also looking away in a bigger region of space too.

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Re: Astronomy

Postby maj. tom » January 11th, 2023, 11:09 am

I don't think there's a difference in captured visible light in a slice of space-time say 100Mlya between Hubble and JWST. The exposure times are similar. It's not like typical exposure time visible light photography with a bigger mirror lens like how we conventionally think of photography on earth, where more exposure time with a larger mirror would reveal fainter details at the same distance in visible light.

The mirror of JWST is also different to Hubble's and made to capture IR at many wavelengths. So say if they just can take a particular slice in space-time, it's easy to think how a larger mirror can capture more light. But in deep space it's different because we know that the captured IR dots in such an image are redshifted and therefore would be further back in time rather than an IR object just sitting in that slice in space. JWST gives a different view to Hubble because it captures different energy, that's how they're looking at nebula and galaxies that Hubble did and discovering lots of new things and why the image looks so different of the same object. Like the Carina nebula a point inside our own galaxy of massive star formation, so very close. There is no redshift. I think this is a good example of how much more JWST can see at a particular distance. There isn't more visible light vs Hubble, but rather a whole lot more frequencies emitted by the region that can be captured.

Unless there are entire galaxies hiding in IR light at a particular slice of space time, the JWST image wouldn't show more numbers of galaxies in that slice. It will show more detail however because it's not visible light, but rather different wavelengths that the telescope was made to capture. Example the Cartwheel Galaxy 500Mlya with Hubble vs. with JWST.
Last edited by maj. tom on January 11th, 2023, 11:13 am, edited 1 time in total.

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Re: Astronomy

Postby st7 » January 11th, 2023, 11:10 am

maj. tom wrote:They're still counting all this data is so new. But it's not really how many more it can now see within the same area, but rather how much further back in time the different telescopes can capture the redshifted energy from then to here and now.

Image


There is a limit to how far back any device can capture because eventually it hits the microwave length red shifted wall of the Cosmic Microwave Background CMB which looks like this in every direction:

Image

Which you can actually see and hear as white static on old timey radios and tv.


in 2014 when i was camping in Toco during carnival and staring into the darkness, i had come up with a theory that we exist in a black hole, and the big bang theorized was probably a black hole created by a dying star in a universe tier above ours. few months later, it was revealed on Cosmos that was an actual theory XD ... well boy talk about feelings of validation lol

but the black hole theory makes sense because the universe is still expanding and that matter, anti-matter, dark matter, etc has to come from somewhere.

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Re: Astronomy

Postby maj. tom » January 11th, 2023, 11:27 am

I came up with a similar idea on my own that nebulized out of watching lectures from Fermilab from Dr. Don Lincoln on the Big Bang. I'll share it sometime because it's a lot of writing. I shared my thoughts with an astronomer and they said that that is actually one idea that some think ( Like Dr. Nikodem Poplawski published in 2010) and involved something called White Holes though nothing can be proven because it would have happened before t=0 and before anything could be observed or imagined before the Planck Era at 10^-43s.

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Re: Astronomy

Postby timelapse » January 11th, 2023, 12:21 pm

My hands shaky and I forgot about buying a phone mount.
Jupiter last night
IMG_20230110_204254.jpg
IMG_20230110_204254.jpg (8.76 KiB) Viewed 1957 times

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Re: Astronomy

Postby st7 » January 11th, 2023, 12:38 pm

timelapse wrote:My hands shaky and I forgot about buying a phone mount.
Jupiter last night IMG_20230110_204254.jpg


what phone u rocking dey?

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Re: Astronomy

Postby timelapse » January 11th, 2023, 1:00 pm

st7 wrote:
timelapse wrote:My hands shaky and I forgot about buying a phone mount.
Jupiter last night IMG_20230110_204254.jpg


what phone u rocking dey?
Old Xiaomi Redmi note 8

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Re: Astronomy

Postby maj. tom » January 26th, 2023, 9:22 am

Asteroid 2023 BU: Space rock to pass closer than some satellites
https://www.bbc.com/news/science-environment-64411469


2023 BU will pass in orbit within 10,000 km from the center point of Earth on 27 January 2023 00:28 UTC at 9.3km/s. It's estimated to be 4-8 meters diameter (so relax).

This one was only picked up last weekend by amateur astronomer Gennadiy Borisov.

Telecommunications satellites orbit at 36,000km

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Re: Astronomy

Postby sMASH » January 26th, 2023, 1:34 pm

maj. tom wrote:
Asteroid 2023 BU: Space rock to pass closer than some satellites
https://www.bbc.com/news/science-environment-64411469


2023 BU will pass in orbit within 10,000 km from the center point of Earth on 27 January 2023 00:28 UTC at 9.3km/s. It's estimated to be 4-8 meters diameter (so relax).

This one was only picked up last weekend by amateur astronomer Gennadiy Borisov.

Telecommunications satellites orbit at 36,000km
That was a lot of gymnastics they did to avoid saying he was Russian.

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Re: Astronomy

Postby Duane 3NE 2NR » January 27th, 2023, 6:53 pm

Image

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Re: Astronomy

Postby Duane 3NE 2NR » January 30th, 2023, 5:31 pm


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Re: Astronomy

Postby matr1x » January 30th, 2023, 5:36 pm

Rocket fuel dump

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Re: Astronomy

Postby maj. tom » January 30th, 2023, 5:40 pm

Image


but seriously it's not something new.

Similarly, from 9 months ago: Japanese astronomer captures the re-entry of 2nd stage of Falcon 9 SpaceX NRO launch on 04-17 in Hawaii

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Re: Astronomy

Postby maj. tom » January 31st, 2023, 10:30 am

Image

This image displays a wider view of the field of stars and galaxies surrounding the spiral galaxy LEDA 2046648. JWST’s NIRCam instrument has picked out a profusion of smaller, more distant galaxies and bright stars around this galaxy, demonstrating the telescope’s impressive resolution in infrared wavelengths. Calibration images such as this one were critical to verify the telescope’s capabilities as it was prepared for science operations, and this one doesn’t disappoint.
https://esawebb.org/images/potm2301b/

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Re: Astronomy

Postby maj. tom » February 17th, 2023, 9:36 am

Pandora’s Cluster (Abell 2744).
Latest deep field image from NASA’s James Webb Space Telescope, featuring never-before-seen details. Astronomers estimate 50,000 sources of near-infrared light are represented in this image from NASA’s James Webb Space Telescope. Their light has travelled through varying distances to reach the telescope’s detectors, representing the vastness of space in a single image. This Deep Field image covers only about 100 arc seconds in our sky. An arc second is 1/3600th of a degree.

Image




Zoomable Image: Pandora's Cluster (NIRCam)
https://webbtelescope.org/resource-gallery/images/zoomable-pandoras-cluster

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Re: Astronomy

Postby aaron17 » February 17th, 2023, 10:38 am

I must admit...'the pillars of creation' sounds and looks epic!

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Re: Astronomy

Postby Duane 3NE 2NR » February 26th, 2023, 10:47 am

Something we don’t give much thought to

3c206a84-b72f-4f05-a749-c99660b2ae3d.jpg

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Re: Astronomy

Postby sMASH » February 26th, 2023, 10:55 am

And the people at the equator?

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Re: Astronomy

Postby maj. tom » February 26th, 2023, 7:31 pm

Just to be clear, the moon doesn't flip, you do while on the surface of the Earth.
So nearer to the equator it depends on which direction you're oriented and looking up since the subtended angle would be small compared to being nearer to the poles.



Image

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Re: Astronomy

Postby sMASH » February 26th, 2023, 7:57 pm

They see it like this:

_____

Cause it is also flat. And northerners and southerners see its faces.

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Re: Astronomy

Postby ruffneck_12 » February 27th, 2023, 10:55 am

Little clouds in the sky these days, and Saharan dust blowing elsewhere

Perfect time to stargaze at the firmament

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Re: Astronomy

Postby aaron17 » February 27th, 2023, 12:19 pm

Never knew the moon part...interesting.
I guess it goes to viewing everything else in space.

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Re: Astronomy

Postby st7 » March 1st, 2023, 5:52 pm

In fact, you might be able to see another pass of a Starlink constellation this evening at 6:47 PM, looking from the northwest to the southeast as it moves across the Caribbean yet again



https://findstarlink.com/#3574810;3
6:47 pm, 1 Mar 2023
Starlink-73 (G6-1) (new), BRIGHT (3.8) for 5 mins
Look from NORTHWEST (312����) to SOUTHEAST (137°)
Elevation (from horizon): start: 10°, max: 80°, end: 11°

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Re: Astronomy

Postby DMan7 » March 1st, 2023, 5:56 pm

Image

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Re: Astronomy

Postby st7 » March 1st, 2023, 6:58 pm

anyone see it? cloud in we nenen

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Re: Astronomy

Postby wing » March 1st, 2023, 7:03 pm

Seen easily in gasparillo

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Re: Astronomy

Postby DMan7 » March 1st, 2023, 7:04 pm

st7 wrote:anyone see it? cloud in we nenen


Still looking....

Image

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Re: Astronomy

Postby st7 » March 1st, 2023, 7:09 pm

wing wrote:Seen easily in gasparillo


damn... lucky man!

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