[HN Gopher] UHZ1: NASA Telescopes Discover Record-Breaking Black...
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UHZ1: NASA Telescopes Discover Record-Breaking Black Hole
Author : raattgift
Score : 30 points
Date : 2023-11-06 17:58 UTC (3 hours ago)
(HTM) web link (chandra.si.edu)
(TXT) w3m dump (chandra.si.edu)
| omnicognate wrote:
| > 3.5 billion light-years from Earth
|
| > mass falls between 10 and 100 million suns
|
| The size of the sun already causes my brain to shut down.
| Everything about this is beyond contemplation.
| lgl wrote:
| The article states that even though it's roughly in the
| direction of a galaxy cluster that's 3.5 billion light years
| away, further observations by JWST found it to in fact be some
| staggering 13.2 billion light years away.
|
| From the article:
|
| > The extremely distant black hole is located in the galaxy
| UHZ1 in the direction of the galaxy cluster Abell 2744. The
| galaxy cluster is about 3.5 billion light-years from Earth.
| Webb data, however, reveal that UHZ1 is much farther away than
| Abell 2744. At some 13.2 billion light-years away, UHZ1 is seen
| when the universe was only 3% of its current age.
| omnicognate wrote:
| Hah, my mind is proportionally more blown then.
| ustamills wrote:
| Wow, if we're seeing it that far in the past I wonder if
| maybe it's large enough to have eaten the universe already
| and we just don't know it yet.
| pdonis wrote:
| Black holes don't "eat" surrounding objects. Their gravity
| is no different from the gravity of any other object of the
| same mass. This hole has a mass between 10 and 100 million
| solar masses; that's about the size of a dwarf galaxy. So
| its gravity would be no stronger than a similarly sized
| dwarf galaxy. We are in no danger of having the universe
| eaten by dwarf galaxies.
| basementcat wrote:
| "Space is big. You just won't believe how vastly, hugely, mind-
| bogglingly big it is. I mean, you may think it's a long way
| down the road to the chemist's, but that's just peanuts to
| space." -Douglas Adams
| Tommstein wrote:
| What breaks my brain is that if the Sun were compressed into a
| black hole, its Schwarzschild radius would be less than 2
| miles, but the biggest black hole we know about so far, Phoenix
| A, has a Schwarzschild radius of almost 2,000 AU. The radius of
| Neptune's orbit is "only" about 30 AU, so Phoenix A's
| Schwarzschild radius is almost 70 times longer. Illustration
| here:
| https://upload.wikimedia.org/wikipedia/commons/d/d3/Phoenix_...
| . And of course, volume increases cubically with radius. I have
| a hard time contemplating that you could make a black hole that
| ridiculously ginormous even if you crammed the entire universe
| into one black hole, and yet Phoenix A is far from the only
| supermassive black hole out there.
| zoeysmithe wrote:
| We're so pitifully small compared to these astronomical
| bodies.
|
| Sometimes I like to think of these things like how a self-
| cognizant AI in a minecraft world would talk about ours. "So
| if you look at our powerful redstone torch computer its an
| 8-bit chip. Outside, they have 64-bit chips! Ours has 3,500
| torches, theirs has at least 7-10 billion!"
| pdonis wrote:
| _> volume increases cubically with radius_
|
| This intuition does not work in curved spacetime,
| particularly not for black holes. Black holes do not even
| have a well-defined volume at all.
| ahmedhosssam wrote:
| Isn't that saying that we are not that important in the
| universe? I mean we should change our behaviour as humanity to
| expand in the cosmos, instead of focusing on silly wars because
| of silly reasons.
| ahmedfromtunis wrote:
| I wonder how big is (was?) that black hole? Is it the size of our
| sun?
| mperham wrote:
| M87's black hole event horizon is larger than our entire solar
| system. 2B+ solar masses.
| _Microft wrote:
| Does UHZ1 mean something like "ultra-high Z, #1"? (Z as in
| redshift)
| _Microft wrote:
| The preprint can be found at https://arxiv.org/abs/2305.15458
| gorgoiler wrote:
| The video on this page does a very good job of answering the
| question a lot of you might be asking right now: what happens
| when you accidentally tread on one of these things:
|
| https://www.mathworks.com/matlabcentral/fileexchange/72254-s...
|
| Blue is free falling into the hole. Yellow is observing and sees
| Blue's clock come to a halt on the horizon. Beyond that much I
| can't really explain but I found the link on this page:
|
| https://physics.stackexchange.com/questions/689129/when-an-o...
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(page generated 2023-11-06 21:00 UTC)