Astronomy and Planetary Science Thread

[Michel Van]

Is the Sun made from liquid metal hydrogen ?
This theory by Pierre-Marie Robitaille, try to solve some problem with Sun physic and Fusion Theories.
Under pressure of Sun Mass, the Hydrogen & Helium is so compress, it turn in liquid metal form.
According Robitaille in this state Hydrogen fusion easier, as under Plasma in current theories.

However Robitaille theory base on pile of assumptions, if one is false, rest is faulty.

View: https://www.youtube.com/watch?v=Jay_R36biQg

 

[Justo Miranda]

Is the Sun made from liquid metal hydrogen ?
This theory by Pierre-Marie Robitaille, try to solve some problem with Sun physic and Fusion Theories.
Under pressure of Sun Mass, the Hydrogen & Helium is so compress, it turn in liquid metal form.
According Robitaille in this state Hydrogen fusion easier, as under Plasma in current theories.

However Robitaille theory base on pile of assumptions, if one is false, rest is faulty.

View: https://www.youtube.com/watch?v=Jay_R36biQg

200 years ago, scientific calculations about the life of the sun were made by assuming that the star was made up of burning carbon. What will they imagine in another two hundred years?... These guys always get these things wrong.

 

[Flyaway]

Scientists are refining plans to build the world’s biggest machine at a site beneath the Swiss-French border. More than $30bn (£23bn) would be spent drilling a 91km circular tunnel in which subatomic particles would be accelerated to near light speeds and smashed into each other. From the resulting nuclear debris, scientists hope they will then find clues that would help them understand the detailed makeup of the universe.

It is an extraordinarily ambitious project. However, it is also a controversial one – for many scientists fear the machine, the Future Circular Collider (FCC), could soak up funding for subatomic physics for decades and leave promising new research avenues starved of resources.

Others argue that the mega-collider is being imposed on physicists by senior officials at Cern, the European Organization for Nuclear Research, without properly consulting researchers.

…

However, the technology to accelerate protons at the unsurpassed energies proposed for the FCC does not exist yet. It is merely assumed that, in 40 years’ time, it will have been developed. Such an assumption worries some scientists, as well as the fact that the FCC will cost so much that it will lock scientists into a device that would monopolise funds for particle physics for decades.

‘The physics community has never split like this’: row erupts over plans for new Large Hadron Collider

Ambitious project could soak up funding for subatomic physics for decades, say opponents

www.theguardian.com

 

[NMaude]

Is the Sun made from liquid metal hydrogen ?
This theory by Pierre-Marie Robitaille, try to solve some problem with Sun physic and Fusion Theories.
Under pressure of Sun Mass, the Hydrogen & Helium is so compress, it turn in liquid metal form.
According Robitaille in this state Hydrogen fusion easier, as under Plasma in current theories.

Despite the stupendous pressures resulting from gravitational confinement I'd say that the Sun's interior is far too hot for liquid metallic hydrogen to be present, IIRC the hydrogen/helium plasma in the core of the Sun is ~six times denser than gold.

 

[Michel Van]

I'd say that the Sun's interior is far too hot for liquid metallic hydrogen to be present

like i say: Robitaille theory base on pile of assumptions, if one is false, rest is faulty.

 

[NMaude]

A new study concerning gravity, from Anton Petrov:

Hello and welcome! My name is Anton and in this video, we will talk about gravity and quantum physics and basically a study that tries to connect both
Links:
https://arxiv.org/abs/2502.17575
https://arxiv.org/abs/gr-qc/9504004https://www.youtube.com/redirect?ev...s://arxiv.org/abs/gr-qc/9504004&v=7YuzRpE6erY
#quantummechanics #astronomy #cosmology

0:00 Study that tries to explain gravity with quantum effects
0:45 What's the problem?
2:30 Particle physics and quantum mechanics explanations
4:00 Why this is important
5:45 Recent study and the quantum approach using entropy
6:50 Analogy explaining this idea
10:55 Can this be tested?
12:25 Conclusions

 

[Flyaway]

Asteroid 2024 YR may not hit Earth in 2032, but it — and others — will keep coming back​

Asteroid 2024 YR may not hit Earth in 2032, but it — and others — will keep coming back

Asteroids’ orbits around the sun may put them in collision paths with inner planets. We may have had a near-miss, but asteroids can pass by the Earth undetected.

theconversation.com

 

[Justo Miranda]

Asteroid 2024 YR may not hit Earth in 2032, but it — and others — will keep coming back​

Asteroid 2024 YR may not hit Earth in 2032, but it — and others — will keep coming back

Asteroids’ orbits around the sun may put them in collision paths with inner planets. We may have had a near-miss, but asteroids can pass by the Earth undetected.

theconversation.com

They will never stop coming until the end of the cycles

 

[publiusr]

Here's a video about weird experiments that can only be performed in space, from Astrum:

That’s the proper attitude in terms of looking at space expenses.

I remember reading old Pop Mech stories about how taxpayers were proud of great sums of money going to do science in remote locations—-an attitude the Greatest Generation had in spades that today’s tech-bros lack.

 

[Grey Havoc]

https://www.rte.ie/news/newslens/2025/0327/1504438-gaia-space-retirement/

 

[Flyaway]

ALMA Discovers “Space Tornadoes” Around the Milky Way’s Core

Swirling through the Milky Way’s central zone, surrounding the supermassive black hole Sgr A*, dust and gases constantly churn as energetic shock waves ripple. An international scientific team using the Atacama Large Millimeter/submillimeter Array (ALMA) has sharpened our view of this action by a factor of 100, discovering a surprising new filamentary structure in this mysterious region of space.

ALMA Discovers “Space Tornadoes” Around the Milky Way’s Core | ALMA Observatory

Swirling through the Milky Way’s central zone, surrounding the supermassive black hole Sgr A*, dust and gases constantly churn as energetic shock waves ripple. An international scientific team using the Atacama Large Millimeter/submillimeter Array (ALMA) has sharpened our view of this action by...

www.almaobservatory.org

Related paper:

ALMA observations of massive clouds in the central molecular zone: slim filaments tracing parsec-scale shocks | Astronomy & Astrophysics (A&A)

Astronomy & Astrophysics (A&A) is an international journal which publishes papers on all aspects of astronomy and astrophysics

www.aanda.org

 

[NMaude]

Astrum has just put out a video about some of the denizens of the inner Kuiper-belt:

Beyond Neptune lies the vast and mysterious Kuiper Belt region, home to ancient icy relics that contain clues about how our solar system came to be.

While Anton Petrov has an amusing April Fool's Day treat:

Hello and welcome! My name is Anton and in this video, we will talk about the funniest paper retraction in the last decade
Links:
https://pubmed.ncbi.nlm.nih.gov/18380...https://www.youtube.com/redirect?ev...bmed.ncbi.nlm.nih.gov/18380130/&v=4581nXI3rxs
https://www.researchgate.net/publicat...https://www.youtube.com/redirect?ev...itchhiking_Women%27s_Hair_Color&v=4581nXI3rxs
https://pubmed.ncbi.nlm.nih.gov/17566...https://www.youtube.com/redirect?ev...bmed.ncbi.nlm.nih.gov/17566448/&v=4581nXI3rxs
https://psycnet.apa.org/record/2008-0...https://www.youtube.com/redirect?ev...t.apa.org/record/2008-05620-006&v=4581nXI3rxs
https://psycnet.apa.org/record/2002-0...https://www.youtube.com/redirect?ev...t.apa.org/record/2002-08352-003&v=4581nXI3rxs
https://steamtraen.blogspot.com/https://www.youtube.com/redirect?ev...ttps://steamtraen.blogspot.com/&v=4581nXI3rxs
https://steamtraen.blogspot.com/2017/...https://www.youtube.com/redirect?ev...s-in-field-study-of-sexual.html&v=4581nXI3rxs
https://retractionwatch.com/2023/03/2...https://www.youtube.com/redirect?ev...ns-five-expressions-of-concern/&v=4581nXI3rxs

Other videos:
https://www.youtube.com/watch?v=K8NqUJaWC0c
• First Results and Experiments Testing...

• April Fools' Astronomy Papers of 2024... https://www.youtube.com/watch?v=4t1MWwT_0BQ

0:00 Study retraction! Bust sizes and hitchhiking...but why?!
2:35 Followups
3:30 Investigation and the retraction
5:35 Bizarre methods
6:25 Things don't add up
7:20 First retraction
8:10 Major issues and conclusions

 

[Flyaway]

Webb snaps photographs of Asteroid 2024 YR4

www.esa.int

 

[NMaude]

Here's an interesting video from Anton Petrov concerning an experiment generating voltage fro Earth's magnetic-field:

Hello and welcome! My name is Anton and in this video, we will talk about generating energy from the Earth's magnetic field
Links:
https://journals.aps.org/prresearch/a...
https://journals.aps.org/prapplied/ab...https://www.youtube.com/redirect?ev...10.1103/PhysRevApplied.6.014017&v=6xytC6u2QoM
Other videos:
https://www.youtube.com/watch?v=MsPHlwlW8vA
• We Could Produce Free Energy From Mol...

• This Is Not a Crane, It's an Insane N...

• Interesting Invention That Turns Your...

• We Found a Way to Generate Energy Fro...

• Looks Like EM Drive Is Officially Dea... https://www.youtube.com/watch?v=ZKDeIu13sSI&pp=0gcJCR0AztywvtLA

#energy #magneticfield #earthhttps://www.youtube.com/hashtag/earth

0:00 Strange proposition for electricity generated by the rotation of Earth
1:35 Original paper that disproved this
2:55 What was done now
4:50 What this means
6:00 How much voltage and is this useful?
7:10 Conclusions and what's next?
8:00 EM drive

 

[NMaude]

Here are a couple of new ones, one is from Dr. Becky and it turns the results of her recently published paper to do with the appearance of Smoot-disc galaxies and the second is from Anton Petrov concerning recent findings about the Andromeda galaxy:

The James Webb Space Telescope, JWST, has been surprising us with new results about the early Universe that we can’t yet explain for the past few years now; from the little red dot galaxies, to the over massive galaxies, and finding galaxies with features like spiral arms earlier in the Universe than we ever thought they should exist. And this month was no exception, when a paper was published by Smethurst and collaborators on the Galaxy Zoo and CEERS teams claiming to have found featureless disc shaped galaxies way earlier in the Universe’s history than we ever thought possible. That’s right, we’re talking about my own research in this week’s video, and I’m so excited that it’s finally been published so that we can chat all about it...

Smethurst et al. (2025) - https://arxiv.org/pdf/2503.21869https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbHotT3RnblVtQWczZDRVd3o5akNOWVlpLVcwUXxBQ3Jtc0tsWkRSSHh5Wm43a3Fvb1hrTjU2ckdkV1BhU3ozZFBRNFZ5VUM3cTR3WG9jWGY3NWlIejd3cEJiaTNsdWxGM2FIM0hLVzhTSnV0aEFmYllCWFRrRG1OY29PVGhCbDhlOHlsZkZ3VDM0b1VZWUZwNnIySQ&q=https://arxiv.org/pdf/2503.21869&v=INhHgflGwaE
Bland-Hawthorn et al. (2023) - https://arxiv.org/pdf/2303.05574https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbWVRTEFHYjNQdkxqZVJfZFFRdHlSdWtqMnh4d3xBQ3Jtc0ttSENnQzJIWTlOWW1jXzEzWGdac0lMWXFNYjNWSDFpVl9uYVJ4NWJMQjNmd0kyZ01mSGx6ZFFXak5TbGp4aENnOTNkbmx3eENQZDB6MzZGQS1XSnpXLVBZR0gxbXVGcmliZk9rNUlsaGtMOVBaaHhhcw&q=https://arxiv.org/pdf/2303.05574&v=INhHgflGwaE
Bland-Hawthorn et al. (2024) - https://arxiv.org/pdf/2402.06060https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbWN1bDZqWThiYlA3NEh5VGc4UDBWaHQyTDhvUXxBQ3Jtc0traXRWeTRtWUswMm1maTFYeEotTDBzNnh0RnN5LUNTS000eWR1MFB6Z2VFQzlRNXY4b3RNQk42ajhNWkNkN1FRNzh4T252VkZtRUJQZDFLNUJUMGstcHViVkh5YjlTeGJqYTFUcnlGRjRReTZWZmQzbw&q=https://arxiv.org/pdf/2402.06060&v=INhHgflGwaE
Feng et al. (2015) - https://arxiv.org/pdf/1504.06618https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbGJyMFcxVWRJNHhTOERKcGduTHhRcE1OTS1GQXxBQ3Jtc0tubFRjblVLOTFZSUFYUVJHSXFIdUtjbmtVMnljNWphdHE5SThiNWlaMC1rYXpORWdaSWZzLU0tbTVJRElfSmowYnZBXzlFaV9tWHVzTEVyTlVBZ2xfQWNoYlR3QTBGVEJKTHNNMTZncnlCY2tHaDRaRQ&q=https://arxiv.org/pdf/1504.06618&v=INhHgflGwaE
Ferreira et al. (2022) - https://arxiv.org/pdf/2207.09428https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbHdEZUJWdUpER21CaTctUk1QWGdpWUpaMXIzQXxBQ3Jtc0tuRExLZnNVWk5palNVb0lqSDMzWkI2OHZFY0FBS1hnMWxZcEdGTE83X2VFRTZMYUhGYWpVTUxzNEZ5MmJXZXRXSGx2WEFRSlQ2MVJMcGtTRW5Xa2dyTDZRYzhtbFE5aHBENGFSNUtYY1dmcVRqNkJkQQ&q=https://arxiv.org/pdf/2207.09428&v=INhHgflGwaE
Ferreira et al. (2023) - https://arxiv.org/pdf/2210.01110https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbUppeXhueGQ0X3NySmlDSFR2U1lUOVNFbzhsZ3xBQ3Jtc0ttMWRJalZ6Q1dQa3ppQ3A2NG9Qdjg4cGN3UTgtcGhJbHNYSEFjcmltR3ZFelNzeEU2d2hTWm93S1NoSGZEZGk1SWdtdmx5MFNOQ1BOcHB5dmdjQjJhSE13aEtQSGdKMXVzdl91RmZjT09TWFB3eDVxRQ&q=https://arxiv.org/pdf/2210.01110&v=INhHgflGwaE
Fraser-McKelvie et al. (2018) - https://arxiv.org/pdf/1809.04336https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbXFjVkxqTFM4WEFzNUdGcW10SUV2R3JIamRhQXxBQ3Jtc0tuYS0yclhqcXVJZlZ2RlpxdlJPSEM1Qk05X2Qta2huY294cXlWU0ZrNG9XSndYR1V0eTd4Rjh0Tm9xZ1BubzNNdjk5TXVzWGtNaC1SaWViQjVSdm56M0p0STJKZlpjOG5GN3h3Y25oMW9hMEQtc29Fdw&q=https://arxiv.org/pdf/1809.04336&v=INhHgflGwaE
Fujii et al. (2011) - https://arxiv.org/pdf/1006.1228https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbF9GekEzVXRXcFdWYXh2WEhjWTFsQzRLdThwZ3xBQ3Jtc0tuemRTMnNyTTNCSGlxR29lMXFZMk1KQUxnQlk4RExjXzh5dGVWMU1pWUhXMmlWWnJRZlk3d0hNXzZkY2xha2tSYm9EMDRVbDdHUUd5bEFxWW1tN2JPVklPWnMtLWx3ZUhsLURGVm1STGs3elRaVUFqSQ&q=https://arxiv.org/pdf/1006.1228&v=INhHgflGwaE
Fujii et al. (2018) - https://arxiv.org/pdf/1712.00058https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqa0V4UWFpNklsM1dmYzRPVWZiRlJSTXhfRVhHd3xBQ3Jtc0ttQTR1NHBjZFFfMEtKTDdmYTBiQThKaVkySmN3RlRCUTdpaUhJaXdUeUtzMHphQVFuT2g2WGlGRlpFcjZ1RGU1eVFCeEw4b2lqR3c3QVVWOUMzV0hSU0pLSkZ5TjRlUGJXYUNwMEZRU0dIcmQ0dnlRcw&q=https://arxiv.org/pdf/1712.00058&v=INhHgflGwaE
Guo et al. (2023) - https://arxiv.org/pdf/2210.08658https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqa1VFMVJRWHpHZHlHZjY2WUZFb0FfU0pLN0xrd3xBQ3Jtc0tsWmZxS296d1A1aVJLVmhSMkhxdThrQ1o3cGZBR3hxV0F6cHVqMllsNTFObW5VcnRKZzZpZEVVdTJiZ0t3ajNDUllKTlE2eDRuOV9VbXg1Y2hxSVlTM3NTWFVpSm5VUVA5eWJsY1l6am9zMXdybE5SZw&q=https://arxiv.org/pdf/2210.08658&v=INhHgflGwaE
Kuhn et al. (2024) - https://arxiv.org/pdf/2312.12389https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqa1JiMlZkU3lqZ1JNUnBXekduVnFqRXlYSTFLUXxBQ3Jtc0tsUllnNlByWmgwYWc4NVZFOGFSRy11bU0xTmtiYzd4bWVDcjZqWjh4LWZRcVNUZnZ0S3k2cWo2Ti1weWZsVUJodTYwRExjY3VsZkd4cDlYTE9WWXpmMlBLdmJKVGw0Wkpia09FRE1QMVNoQ2RRbml5bw&q=https://arxiv.org/pdf/2312.12389&v=INhHgflGwaE
Labbe et al. (2023) - https://arxiv.org/pdf/2207.12446https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbU5kb1YteW9lVkltSHVRVC0ycVBKOURJekhld3xBQ3Jtc0tsTkVYbDZLdVlWWUVMTUJOVmlLallLeHU4OTY5eGtvdkR5SS1qQ2RucE9jUzZzVzZCdldicnVNTE9mZV9kTGlxbUR4X053d3V1NURjcXFBaXRwazNZOXZ4XzBYMWVGR3VuNjducXFVMWRzbTJqSWtDdw&q=https://arxiv.org/pdf/2207.12446&v=INhHgflGwaE
Liang et al. (2024) - https://arxiv.org/pdf/2311.04019https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbnFKVVllOERtOWdpZG1JME9PRm1aNVVpTGhhQXxBQ3Jtc0trRWV4dV83RVBUTG8wY1lBcU9KUDV2UC1YU1pOY0o0dVNaR0RXVFIwTWxHX1A1N05sT09TS2VzQ1lqUzVUZFZzbmlhSGUyRFQyOU5FU1VjZl95UmtOZk9KS3VyZ1l5Q1ZDQTVVOUVVeThHUzVLMXlCdw&q=https://arxiv.org/pdf/2311.04019&v=INhHgflGwaE
Simmons et al. (2017) - https://arxiv.org/pdf/1610.03070https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqa3Zhd3lZbXpxcVNpZXdFRHppTXVfTnVRTUhNQXxBQ3Jtc0trTUZFRVFwN3U5UDVUdVlScy10TkJPMnBQQU9XaGpBMXduZ2hRQlU1UVFMX0tTeWJta3RZZ2NhRVd4UVhTZVZtQWUxSkstOUlKSlJLWkpXcGx2bEZWQmtQdkNXdEN5amZMZ21GOWVjTVJTekE0SUxiRQ&q=https://arxiv.org/pdf/1610.03070&v=INhHgflGwaE
Walmsley et al. (2023) - https://arxiv.org/pdf/2102.08414https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqazZ0MGl0RXMycF94WlE2X2pwSnQwMnVGbE5LZ3xBQ3Jtc0tuNF9hZXdIdWVkNEhoTWtERTV3MnlXSTUtQ3B4NE9uSjU1TURvdHotd0RPTm8tMVJMOE9rQnRPeUJvQjluOXYyYU16SFlXODhrMDJ6MktwazRUTHg2dmgyUkF1cUZnUzJiZDFRb0k4Vlo1SWdpek5xSQ&q=https://arxiv.org/pdf/2102.08414&v=INhHgflGwaE
Walmsley et al. (2025) - https://arxiv.org/pdf/2503.15310https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbURMWlo3SjJNTm83RjFxdlBhSUhTQmlUdm41Z3xBQ3Jtc0tuSHZjaU9ndk9tUG56bThVaUowNTBHNUxXb2wway1RZUFtY2ZuYjRLa2dnYXpidWpOMFdqOGFlNTMwSVFuZl82X1RlaDZhNlR6Rm1fQzN3aDV4UDZfd1I0Rkxrb2JvTHF5dlBjZm1CdkRtWkNrdUtQMA&q=https://arxiv.org/pdf/2503.15310&v=INhHgflGwaE

00:00 Introduction
02:25 What are featureless discs and why do we care about them?
06:44 How we found these featureless discs in JWST data
14:54 Are they truly are featureless discs?
16:53 What this means for how galaxies evolve in the Universe
19:11 Bloopers

Hello and welcome! My name is Anton and in this video, we will talk about the Andromeda
Links:
https://iopscience.iop.org/article/10...https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbGlDVnBuSFFxalJvUmZvQUlYNm5ndzNydlhCUXxBQ3Jtc0tuZ016ZGFTWXNKQ0ctUUs0UjR4c0NqanJDR1RrSG9rOFh2ZWQ2S280UEl4MzlWOTBjanQwdEJFMWNQd0hraXVJZ3NSYVZWSFFMT2ZkUWQ0TW1OZWNyQlhtSU9CVTV5ZkNrTXh2SVdwaTJOVFZvWXM2dw&q=https://iopscience.iop.org/article/10.3847/2041-8213/adb433&v=q8ac0CdAiCA
https://iopscience.iop.org/article/10...https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqa1E2bXhlOGNEcHEyeXl4ZDFLQUhsMDNvbGxGZ3xBQ3Jtc0tudElaQ3RfNlhQUHdZNjB0cmxocHdWdG9NRWNmaVZ3VnNPbGdGS2JQWWVaSzlaV3N5Rll6QnlNNnNUbmZyRWRMdm1WMzZTc0huWXFwa29VeEd3eGtxd0VXVHNFQUM5WjBWLVR0SjEwMGpzdUtMaVhTMA&q=https://iopscience.iop.org/article/10.3847/1538-4357/aca5f8&v=q8ac0CdAiCA
https://arxiv.org/abs/2301.10381https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbXFOS3lPOHMwem51dGxBWTFhME5jSzhDenJ0QXxBQ3Jtc0tudUphdk4xYTQyTmdJdVBIMUtMMjJPODN3NDFiY3Y1NEhDcVFDSXZ5QWc0UG1wOTMwUkNHbnlLbnRmOU5FLWNSSFdwN3Jrc0NqYzMxVVYtd09CMzhENkdLR05SZVBpSTJ5dC03Z0g0MWtSeHB5YzlUYw&q=https://arxiv.org/abs/2301.10381&v=q8ac0CdAiCA
https://iopscience.iop.org/article/10...https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbEhzZlNWa0ZFSi0yalZIUmkyODRIRzZoWXRFZ3xBQ3Jtc0tsX29mSzRCYlJLSEtpby1qaUd6X0FQbHFGSHVNNHZoRnVJZFI0OC1MZ2dNWndqeGwwNllxTmpXR2ZOdEROSE9JeDIwbFp4Vk5lc19QNUtiQk1mWEtZc0QyMWNGLWJoYTBYbXJwOWFLLVZPX1phMUw0Yw&q=https://iopscience.iop.org/article/10.3847/1538-4357/ace2c3&v=q8ac0CdAiCA
https://iopscience.iop.org/article/10...https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbjQwZEg0NWV2VUF5TG8wZ0xadm1tY1NWQUF0d3xBQ3Jtc0ttMmkta29mWFJTVDNXWm5RZmlYQjMyWWh1YlhkMy1iT3BVZnRXdExiSjl2THF6MG1VUHRNamNWM0ZMbXlEODB0SndrRnRkMFdKZE9GblhlVnM1T291YUMweTJhVENxY1o1LVhNWkotSWw4cnp4bDB5aw&q=https://iopscience.iop.org/article/10.3847/1538-4357/ad7e2b&v=q8ac0CdAiCA
https://arxiv.org/abs/2502.09792https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbFNNYVpTaDBsN0w1dW12QlZEWG5KckxwVHJFUXxBQ3Jtc0tuMGlGdV9WTEdER1h1RVZsbU1VN3NLZ29Ib0dJY2diVy1FUWRubWV4Qm9NbkhIRFFpZ0R6NDlSY0xyOFVsMEIwY1N3cWJfN3BWS3VTb0xKWWREOGNOU211WGk1MkF0TjZqcnc1dDVTdjF0M1NEV2N4cw&q=https://arxiv.org/abs/2502.09792&v=q8ac0CdAiCA
Additional videos:
• Scientists Discovered the Collision T...

View: https://www.youtube.com/watch?v=MQzwrWVC8Bo

• Disappearance of a Star in Andromeda ...
• 100 Years Ago a Single Star In Androm...
• Andromeda Galaxy Turns 100 Years Old,...
• 100 Years Ago Scientists Failed to Re...
• Extraordinary Object Found in Orbit A...
• James Webb Solves One of the Biggest ...

View: https://www.youtube.com/watch?v=k0n7Nvbf-d8


#galaxy #andromeda #cosmology

0:00 Andromeda discoveries
0:35 Why this matters
1:10 Hubble telescope survey
2:05 Different history from Milky Way
3:00 Major cataclysmic event
4:15 Collision remnants
5:20 Central black hole explained
7:45 Satellite galaxies are strange
8:50 Unexpected satellite around Andromeda
11:20 Smallest and dimmest galaxy ever seen
12:50 Why this makes no sense
14:25 Conclusions

 

[NMaude]

PBS Space Time has uploaded a video pointing out that Earth had at least once in its' past an ring-system orbiting it:

Planet Earth is the jewel of the solar system—the shimmery blue oceans, the verdant green forests, the wispy whimsical cloud formations. Saturn is the only competitor for most gorgeous planet with that giant ring system. Hmm… what if we could put the jewel of the Earth in its own ring? Then no contest. Well, there’s an extremely good chance that Earth once DID have a ring system. At least, that’s the proposal by a recent study that has evidence that a mysterious burst in meteor activity nearly half a billion years ago was actually caused by that ancient ring system collapsing onto the Earth. And, you know, if we had a ring once maybe we can have one again.

Check Out Joe Scott’s: What Would Happen If The Earth Had Rings?

00:00 Introduction
00:38 Channel Announcements
01:21 New Community Format + Patreon
02:35 Main Hypothesis
04:20 Lunar Debris Theory
07:15 Asteroid Impact Theory
10:35 Ring Lifespan & Dissappearance
14:46 Final Thoughts and Future Questions