Re:Early universe's 'little red dots' may be black hole stars
by BurningFrog on Wednesday July 30, 2025 @06:47PM
(#44740440)
Forgive me for being off topic, but I must say how astonished and happy I am that Soundgarden's nonsense song title from 1994 now is a real science concept:
Re:Early universe's 'little red dots' may be black hole stars
by api on Wednesday July 30, 2025 @09:48PM
(#44741559)
My favorite is that there are probably primordial black holes, which is exciting because they are a good dark matter candidate. They could have other neat implications too, like being common enough that we might some day find one within visiting range. Being able to examine one directly could allow us to “finish physics.”
Note that many if not most variations on the Big Bang and inflation predict them but we have yet to directly see them. What JWST has found is indirect evidence they’re out there.
It’s 4 years old; I don’t know if this JWST finding changes anything. I do know we have finally found some (one?) intermediate-mass black holes in the interim, but I don’t know if that changes it either.
The possibility it leaves open for “Planck relics” is interestingly exotic
Re:Early universe's 'little red dots' may be black hole stars
by spwa4 on Thursday July 31, 2025 @07:42AM
(#44744627)
Yeah the mass ranges these primordial black holes would need to be mean that it cannot possibly be those little red dots. While the early universe magnifies things, the mass of those little red dots still needs to be close to a small galaxy worth of mass. Tens to hundreds of thousands of star masses absolute minimum. And that's just far, far, incredibly far to high.
Re:Early universe's 'little red dots' may be black hole stars
by prox on Thursday July 31, 2025 @06:46AM
(#44744282)
I wonder if the time estimates of ~13.8 billion years hold up for the big bang in the future. I remember a physicist talking about time and space being fuzzy in the real early universe.
Re:Early universe's 'little red dots' may be black hole stars
by dylan604 on Wednesday July 30, 2025 @09:59PM
(#44741619)
Sounds like it's working as expected. It would have sucked if it started working and saw nothing new. I really like how the headlines have just become "JWST discovers something new. Again."
Re:Early universe's 'little red dots' may be black hole stars
by dylan604 on Thursday July 31, 2025 @09:23AM
(#44745390)
Not really sure why my comment is being read as negative. If JWST wasn’t constantly seeing things “never seen before” it would be a failure. The fact this constant discovery is being recognized by anyone paying attention is summed up with headlines appending again to them. Maybe you think the punctuation is important and needs an exclamation point?
Maybe you’re a genZ that thinks every little thing needs gold stars, overly enthusiastic praise, and a pizza party when things are working as expected or else a tantrum ensues crying about everyone being so mean to you?
Re:Early universe's 'little red dots' may be black hole stars
by olddustytrail on Thursday July 31, 2025 @09:56AM
(#44745703)
That's a rather petty closing paragraph. Your comment would be better without it.
There is actually great value in confirming things we thought were probably right. A person upthread mentioned that the LHC hadn't discovered much new, but the vast majority of its data does provide confirmation of what we thought and when we talk about a "reproducibility crisis" it is actually good to know that these things are correct even if it's not headline news.
Re:Early universe's 'little red dots' may be black hole stars
by voxleone on Wednesday July 30, 2025 @06:31PM
(#44740295)
Upon reading the title, I would have expected some gravitational redshift to be part of the explanation, which made me wonder—are we sure none of that deep gravity well effect is contributing to the redness? That said, I understand the community tends to favor AGN-related causes: rapid Doppler broadening of emission lines, infrared dust reprocessing, and cosmological redshift seem to account for most of what’s observed.
Re:Early universe's 'little red dots' may be black hole stars
by dylan604 on Wednesday July 30, 2025 @06:40PM
(#44740387)
I'm no astronomer trying to have work published, but wouldn't a mistake like that be one of the most obvious things to attempt to test your own work against before releasing the results? Is the fear of releasing an obvious mistake and the damage to one's reputation just not present anymore, or is first to publish so critical that mistakes are forgiven? To me, if I was going to present a paper that goes against existing conventional thinking, I'd want to make sure my paper stood up to the most rigorous review including (especially?) from HN commenters.
Re:Early universe's 'little red dots' may be black hole stars
by voxleone on Wednesday July 30, 2025 @07:06PM
(#44740585)
Fair point — I don't think gravitational redshift was completely ignored, but perhaps it was ruled out early and not discussed in the public-facing article. In most astrophysical observations, especially with JWST, cosmological redshift and AGN mechanisms usually dominate the interpretation, but I agree: when something challenges conventional thinking, even “obvious” effects deserve a clear mention or elimination.
Re:Early universe's 'little red dots' may be black hole stars
by devmor on Wednesday July 30, 2025 @09:03PM
(#44741324)
I think your comment/complaint is indicative of something I've mused about for a while in regards to science articles - I wish there were a level of common scientific publication somewhere between "novice" and "expert".
I don't need it explained to me like I'm five, but I would like it explained to me like I'm a curious student who's taken a course or two on the subject.
Re:Early universe's 'little red dots' may be black hole stars
by andrewflnr on Wednesday July 30, 2025 @11:57PM
(#44742190)
Veritasium is definitely more at the beginner level. I'm not terribly familiar with Vsauce but my impression is that he's even more mass-market. On YouTube, PBS Spacetime tries to be mass-market but ends up requiring some background knowledge, for better or worse. :D
Re:Early universe's 'little red dots' may be black hole stars
by andrewflnr on Wednesday July 30, 2025 @11:52PM
(#44742168)
There's already a ton of redshift from the universe expanding, so they're definitely correcting their spectra for some amount of redshift. I'd love to know if there's a way to tell the two sources of redshift apart, or if significant redshift from climbing away from the hole just makes it look a smidge farther away.
But honestly I'd guess that the light is emitted too far from the horizon to be redshifted very much by the black hole.
Re:Early universe's 'little red dots' may be black hole stars
by jordanb on Thursday July 31, 2025 @12:00AM
(#44742199)
The redshift in the early universe is actually why the JWST is an infrared telescope. Hubble was limited to higher wavelengths and couldn't see objects that were excessively redshifted.
But no in this case these objects are red even in comparison to nearby objects.
Re:Early universe's 'little red dots' may be black hole stars
by xorbax on Thursday July 31, 2025 @10:44PM
(#44752543)
Shame he doesn't know enough to formulate a theory that this data could be compared to.
Maybe people will give him enough money to rent a scientist who can do the actual work for making it a coherent hypothesis that JWST data can be compared to.
Re:Early universe's 'little red dots' may be black hole stars
by mosesbp on Wednesday July 30, 2025 @06:34PM
(#44740328)
Making progress on these key issues in galaxy evolution and black hole growth is exactly the kind of research that will not happen (or at minimum be extremely limited) under the current administration’s grant cancellations, funding cuts,
and staffing reductions at the NSF and NASA, the two of which account for almost all of US astronomy research funding.
Re:Early universe's 'little red dots' may be black hole stars
by Hammershaft on Wednesday July 30, 2025 @07:48PM
(#44740879)
It's just depressing. Such a moronic & self sabotaging policy. I'd say people should look at the evidence on the returns from NSH & NSF funding but if people cared about basing policy on evidence we wouldn't be here in the first place.
Re:Early universe's 'little red dots' may be black hole stars
by dylan604 on Wednesday July 30, 2025 @10:02PM
(#44741638)
How is studying a black hole going to make the rich richer? If it's not, then it's not worth doing. It doesn't take a rocket scientist to figure that out. All of you poors should be less concerned about make believe spacey stuff, and figure out how to give more of your money to the rich.
Re:Early universe's 'little red dots' may be black hole stars
by vivzkestrel on Thursday July 31, 2025 @12:20AM
(#44742268)
I wish we could have faster than light travel by compressing space somehow, go to these 50 billion light years away objects and actually verify if they are a galaxy or not. Even if you could insta teleport to every object, I think it would still take an infinite amount of time to visit every star, every galaxy and every planet for just 10 seconds
Re:Early universe's 'little red dots' may be black hole stars
by wewewedxfgdf on Thursday July 31, 2025 @12:30AM
(#44742313)
You can't get there because you can't out run the growth of space itself and even if you got there, whatever it was you came to see was there at last 50 billion years ago and wouldn't look the same, or possibly no longer exist.
Re:Early universe's 'little red dots' may be black hole stars
by griffzhowl on Thursday July 31, 2025 @05:56AM
(#44744040)
Not 50 billion years ago because the universe is only about 13.8 billion years old as of current thinking. Space has been expanding in the time it's taken light to travel so "light years away = time ago light was emitted" gets increasingly wrong at longer distances
Re:Early universe's 'little red dots' may be black hole stars
by sigmoid10 on Thursday July 31, 2025 @04:52AM
(#44743704)
That's not an astronomy thing, that's a general science thing. Everything is just an educated guess until we build something to study it in more detail. And when we confirm or disprove something, we can make new guesses using the added info.
https://youtu.be/3mbBbFH9fAg?si=cnB-WVsE9OLuF-GK
said no more counting dollars, we’ll be counting stars
https://www.youtube.com/watch?v=mgT0N3tMP74&pp=ygUJI3JpcGV0a...
This list doesn't even include the red dots: https://www.astronomy.com/science/the-10-greatest-jwst-disco...
Note that many if not most variations on the Big Bang and inflation predict them but we have yet to directly see them. What JWST has found is indirect evidence they’re out there.
https://youtu.be/qy8MdewY_TY?si=9jc_a7IAm4qrhfNX
It’s 4 years old; I don’t know if this JWST finding changes anything. I do know we have finally found some (one?) intermediate-mass black holes in the interim, but I don’t know if that changes it either.
The possibility it leaves open for “Planck relics” is interestingly exotic
"I discovered a new element!"
"It's expected we'd find a new one eventually. Now get back to work"
Maybe you’re a genZ that thinks every little thing needs gold stars, overly enthusiastic praise, and a pizza party when things are working as expected or else a tantrum ensues crying about everyone being so mean to you?
The fact that you didn't deny it means I was spot on, lol.
There is actually great value in confirming things we thought were probably right. A person upthread mentioned that the LHC hadn't discovered much new, but the vast majority of its data does provide confirmation of what we thought and when we talk about a "reproducibility crisis" it is actually good to know that these things are correct even if it's not headline news.
Sure, call me out, but not the petty comment which I replied? I think the petty meter has become too sensitive
I've written many comments where I added a dig at the end but I now try to remove them because they rarely help.
https://en.m.wikipedia.org/wiki/Black_Hole_Sun
https://www.google.com/maps/place/Black+Sun+by+Isamu+Noguchi...
I don't need it explained to me like I'm five, but I would like it explained to me like I'm a curious student who's taken a course or two on the subject.
I'd really like to see a whole magazine (or website) dedicated to it, one day.
But honestly I'd guess that the light is emitted too far from the horizon to be redshifted very much by the black hole.
But no in this case these objects are red even in comparison to nearby objects.
Maybe people will give him enough money to rent a scientist who can do the actual work for making it a coherent hypothesis that JWST data can be compared to.
https://m.youtube.com/watch?v=aeWyp2vXxqA
I wish I was joking
God's will, I suppose. Best donate more to my megachurch.
won’t you come
wash away the rain?