Astronomy and Planetary Science Thread

FighterJock said:
What happens now if they prove that Dark Energy is just something wrong with the equations, where do we go from here?
Click to expand...
Many of these predictions lack experimental evidence to back them up and perhaps do so forever because the experiments that would be necessary to prove their validity are outside the available energy scale.

With all due respect to the beliefs of others, I think this sounds a lot like a dispute between two religious sects that will continue indefinitely because revealed truth is long overdue.

If these guys were dedicated to chess, it would not change anything in the world of experimental science.
 
That Nemesis hypothesis has always fascinated me ever since I had read Issac Asimov's Nemesis science fiction book back in 1989, somehow if Nemesis was real then it should be somewhere out in the wider Galaxy NMaude.
 
Dark Energy Camera snaps thousands of galaxies in stunning Antlia Cluster view

View: https://www.youtube.com/watch?v=1lLxzL3jtwU


Jan 2, 2025
The Dark Energy Camera on the Víctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory in Chile captured an "ultra-deep view of the Antlia Cluster," according NOIRLab.

Credit:
Images and Videos: Dark Energy Survey/DOE/FNAL/DECam/CTIO/NOIRLab/NSF/AURA/T. Slovinský/R. Colombari & M. Zamani (NSF NOIRLab)/N. Bartmann (NSF NOIRLab)

Music: Stellardrone - Airglow
Click to expand...
 
Some experimental evidence showing photons experiencing negative time, from Anton Petrov:


Hello and welcome! My name is Anton and in this video, we will talk about a discovery of negative time observed in a quantum experiment
Links:
https://arxiv.org/pdf/2409.03680https://www.youtube.com/redirect?ev...ttps://arxiv.org/pdf/2409.03680&v=_ih1Ofn8k1s
https://arxiv.org/pdf/2310.00432https://www.youtube.com/redirect?ev...ttps://arxiv.org/pdf/2310.00432&v=_ih1Ofn8k1s
Click to expand...
Other quantum physics discoveries: • Quantum Physics https://www.youtube.com/playlist?list=PL9hNFus3sjE5fWOXSJRo4CEj7xnTaysOW
Click to expand...
0:00 Negative time observations
0:50 The study and what it was for
2:25 Time delay question and the experiment involved
3:15 Quantum effects can be weird
3:50 What is this negative time that was found?
6:00 Data and results
6:50 Possible scenarios and explanations
7:40 Conclusions and implications
Click to expand...
#quantum #physics #antonpetrov
Click to expand...
 
FighterJock said:
That Nemesis hypothesis has always fascinated me ever since I had read Issac Asimov's Nemesis science fiction book back in 1989, somehow if Nemesis was real then it should be somewhere out in the wider Galaxy NMaude.
Click to expand...
Sometimes I wonder if Gliese 710 is a smaller, but closer object
 
The Fermi paradox is simply too optimistic, it is based on the possible existence of other technological civilizations existing at the same time as ours, endowed with FTL technology and interested in exploration and contact with other intelligent races of this galaxy, in addition to what we know today life and intelligence take time to appear even in the most favorable environmental conditions... So many almost impossible conditions make the idea of possible contact a paradox, because the question is poorly posed.

Since the first metallic stars formed, hundreds of civilizations have existed and disappeared before life arose here.

If we have already been on the verge of extinction on several occasions, perhaps a large number of other civilizations would not have been so lucky, and a large number of the survivors may not have had any interest in the technology and in the development of FTL engines. And perhaps civilizations more advanced than us have no interest in contacting us... For the same reason I have no interest in learning the Swahili language... or perhaps they are computer organisms without organic bodies.

There are many things that we have discovered since the paradox was formulated and that substantially modify its approach.

And even if we were the only form of life in the galaxy... What about the other galaxies?
 
Last edited:
The main mystery researchers find about the beginning of life is the statistical improbability that amino acids combined in the right sequence to duplicate later. We have always thought that the environmental conditions of our planet are ideal for today's life, but it is worth asking if they are also ideal for the beginning of life.

In my opinion, what we know about the outer moons should be considered and experimented with the conditions that we think may exist at the bottom of the oceans of those moons, under conditions of pressure, temperature and solubility totally different from ours... Who knows how salt water behaves at that depth?

Imagine that a Saturn moon containing a very simple form of life alters its orbit and disintegrates when it reaches the Roche limit, its inner oceans would freeze, and perhaps a large space iceberg could fall into our oceans.

Why not?
 
Does the Universe have a memory, from Anton Petrov:


Hello and welcome! My name is Anton and in this video, we will talk about gravitational wave memories of the universe
Links:
https://journals.aps.org/prl/abstract...
Other videos:
https://www.youtube.com/watch?v=LttmT5-f34g&t=0s
• Major Gravitational Waves Announcemen...

• Does Universe Remember? Gravitational...

• Gravitational Waves and Black Hole Co...

• Wow! We Now Have a Map of Gravitation... https://www.youtube.com/watch?v=XoYir2k28qM&t=0s

#gravitationalwaves #memory #universe
Click to expand...
0:00 Gravitational wave intro
1:50 Intriguing unproved proposition: gravitational memory
5:15 Why not detected yet
6:00 Future mission that may find this
6:40 How we could find these using modern technology
8:30 What's next?
Click to expand...
 
James Webb Telescope found something: four more strange galaxies that appear older than the universe itself.

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


There some theory about that
Roger Penrose proposed once older universe before our big bang

Burkhard Heim theorised that Universe is far older 1x10+125 years !
it expands slower in form of empty Space Time since then, until 40-15 billion years ago, wen Matter began to exist.
Here our universe expand inside a vast empty volume of Space-Time.
this theory could explain the four old strange galaxies and stars who are older as Universe in Big Bang theory.
 
Last edited:
Newly discovered 'kiss and capture' mechanism explains the formation of Pluto and its largest moon

Billions of years ago, in the frigid outer reaches of our solar system, two icy worlds collided. Rather than destroying each other in a cosmic catastrophe, they spun together like a celestial snowman, finally separating while remaining forever linked in orbit. This is how Pluto and its largest moon, Charon, originated, according to a new University of Arizona study that challenges decades of scientific assumptions.
Click to expand...

…

The study also suggests that both Pluto and Charon remained largely intact during their collision, with much of their original composition preserved. This challenges previous models that suggested extensive deformation and mixing during the impact, Denton said. Additionally, the collision process, including tidal friction as the bodies separated, deposited considerable internal heat into both bodies, which may provide a mechanism for Pluto to develop a subsurface ocean without requiring formation in the more radioactive very early solar system – a timing constraint that has troubled planetary scientists.
Click to expand...

Newly discovered 'kiss and capture' mechanism explains the formation of Pluto and its largest moon | University of Arizona News

A new U of A study challenges decades of scientific assumptions about the origin of Pluto and its largest moon, Charon.
news.arizona.edu news.arizona.edu

Related paper:

www.nature.com

Capture of an ancient Charon around Pluto - Nature Geoscience

Numerical simulations suggest that Pluto’s moon Charon was captured intact, in a scenario in which the two bodies temporarily merged in a collision but did not coalesce due to solid strength effects.
www.nature.com www.nature.com
 
Here's a video about the unexpected discovery of two asteroid imapacts 35 million years ago (During the Eocene specifically the late Priabonian age), from Anton Petrov:


Hello and welcome! My name is Anton and in this video, we will talk about two massive craters from 35 million years ago
Links:
https://www.science.org/doi/10.1126/s...https://www.youtube.com/redirect?ev...org/doi/10.1126/science.adk3705&v=XsKdmKUV9fo
https://www.nature.com/articles/s4324...https://www.youtube.com/redirect?ev...com/articles/s43247-024-01874-x&v=XsKdmKUV9fo
Australian impact: • Evidence For The Biggest Impact Crate... https://www.youtube.com/watch?v=aKAcT2X9lkU&t=0s
Chesapeake Bay: • Asteroid Impacts Create Habitable Con... https://www.youtube.com/watch?v=30EQ9qvLb3M&t=0s
#impact #crater #earthhttps://www.youtube.com/hashtag/earth
Click to expand...
0:00 Biggest recent impacts on Earth
1:20 Volcanoes vs impacts
2:20 Largest impacts and ones that are intriguing
5:30 Initial effects of some of the impacts
6:30 Even more impacts at the same time?
7:20 What effect on the planet did this have?
8:30 Evidence and fossils
9:55 Unrelated shifts in climate
11:15 Conclusions
Click to expand...
 
Michel Van said:
James Webb Telescope found something: four more strange galaxies that appear older than the universe itself.

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


There some theory about that
Roger Penrose proposed once older universe before our big bang

Burkhard Heim theorised that Universe is far older 1x10+125 years !
it expands slower in form empty Space Time since then, until 40-15 billion years ago, wen Matter began to exist.
Here our universe expand inside a vast empty volume of Space-Time.
this theory could explain the four old strange galaxies and stars who are older as Universe in Big Bang theory.
Click to expand...
It is rude to ask a galaxy about its age. Those guys don't act like gentlemen.
 
New Cosmic Microwave Background Measurements Sharpen Puzzling "Hubble Tension"

“Because the SPT results are independent of Planck, they could have landed anywhere in the range of ‘agreeing with Planck’ to ‘agreeing with the local measurements,’ and they landed right on top of Planck. This sharpens the Hubble tension, at least with the most widely accepted local measurements,” Professor Crawford told IFLScience.
Click to expand...

www.iflscience.com

New Cosmic Microwave Background Measurements Sharpen Puzzling "Hubble Tension"

Observations with the South Pole Telescope have revealed an independent addition to the biggest problem in cosmology.
www.iflscience.com www.iflscience.com

Related paper:

 

Attachments

  • 548.jpg
    548.jpg
    1.5 MB · Views: 2
  • 549.jpg
    549.jpg
    96 KB · Views: 1
A new study indicating that the Sun has a super-flare once every 100 years or so, from Anton Petrov:


Hello and welcome! My name is Anton and in this video, we will talk about the unnerving discovery that our Sun may product powerful superstorms way more frequently than we thought
Links:
https://www.science.org/doi/10.1126/s...https://www.youtube.com/redirect?ev...org/doi/10.1126/science.adl5441&v=TafL6YA8Qck
https://agupubs.onlinelibrary.wiley.c...https://www.youtube.com/redirect?ev...ey.com/doi/10.1029/2023SW003807&v=TafL6YA8Qck
https://www.mps.mpg.de/superflares-on...https://www.youtube.com/redirect?ev...rflares-once-per-century?c=6775&v=TafL6YA8Qck
https://royalsocietypublishing.org/do...https://www.youtube.com/redirect?ev....org/doi/10.1098/rsta.2022.0206&v=TafL6YA8Qck

Previous videos: • Did We Live Through a Carrington Even...
https://www.youtube.com/watch?v=GCC19IS0_Zc&t=0s
• Wow! Did We Just Live Through an Actu...

• Most Powerful Solar Storm Ever Happen...

• Unexplained Radiation Storms Hit Eart...

• Our Sun Is Capable of Giant Superstor... https://www.youtube.com/watch?v=EXstRq3vius&t=0s

#sun #solar #miyakehttps://www.youtube.com/hashtag/miyake
Click to expand...
0:00 Discoveries about the Sun that are a bit surprising
0:35 Richard Carrington
1:55 Geomagnetic storms that are even more powerful - Miyake events
4:20 Study attempts to understand these events through other stars
7:00 Important sidenote
8:45 Conclusions
Click to expand...
 
Rhinocrates said:
The Initiative for Interstellar Studies has announced a competition to design the habitat of a generation starship, Hyperion. They expect to announce winners 2nd June next year.

Project Hyperion | interstellar generation ship design competition

Project Hyperion explores the feasibility of crewed interstellar travel via generation ships, using current and near-future technologies. A generation ship is a hypothetical spacecraft designed for long-duration interstellar travel, where the journey may take centuries to complete. The objective...
www.projecthyperion.org www.projecthyperion.org

Brief here:


Generic starship as a whole:


View attachment 746236
Click to expand...
Would you like to join my team for design a starship?
 
The most powerful explosion (A GRB) ever seen by humanity hints at Dark Matter particles, from Anton Petrov:


Hello and welcome! My name is Anton and in this video, we will talk about major updates about the most powerful explosion we've seen that happened in 2022 (GRB 221009A)
Links:
https://arxiv.org/abs/2412.21175https://www.youtube.com/redirect?ev...ttps://arxiv.org/abs/2412.21175&v=LvtnKtmyULk
https://en.wikipedia.org/wiki/GRB_221...https://www.youtube.com/redirect?ev....wikipedia.org/wiki/GRB_221009A&v=LvtnKtmyULk
https://www.nasa.gov/missions/nustar/...https://www.youtube.com/redirect?ev...ed-had-other-unique-features-2/&v=LvtnKtmyULk
https://en.wikipedia.org/wiki/Two-pho...https://www.youtube.com/redirect?ev...dia.org/wiki/Two-photon_physics&v=LvtnKtmyULk

Previous videos:
https://www.youtube.com/watch?v=uZtHLmkGy6w&t=0s
• Cosmic Explosion That Blinded Our Sat...

• Did Most Powerful Explosion Ever Seen...

• Most Powerful Explosion Since the Big...

• Neutron Stars May Be Covered in Axion...

• Possible Detection of Axions From The...

• Most Powerful Explosion Humanity Has ... https://www.youtube.com/watch?v=RHSoIDmolBE&t=0s
Click to expand...
0:00 Most powerful explosion ever seen - GRB 221009A
3:00 What caused this?
3:35 What makes no sense here
5:35 What happens to high energy photons
6:30 Intriguing resolution using axions
7:55 Axions and magnetic fields
10:00 Conclusions and what's next?
Click to expand...
#gammarayburst #universe #science
Click to expand...
 
A new study has found that Pluto and Charon may've formed differently than previously thought, from Anton Petrov:


Hello and welcome! My name is Anton and in this video, we will talk about the formation of Pluto and Charon
Links:
https://www.nature.com/articles/s4156...https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbkNFZ212Z2hBYm12a0VaYTNtZnpXT2E2WWZMZ3xBQ3Jtc0trLUlfaTRCam1NZ3pRcEZjOXdiVzFfNWlwdHJJRVdRbV9ORTVlT2d5cy1kQ282N0ZMMXZ2ZGk0RG5FdmlnOW9SRmw1akNUMGh4YXVqZTltZnhnRUhHd1l1d3F0T1hxOFQxa01SNkE1Ri1rLVA1TUl1RQ&q=https://www.nature.com/articles/s41561-024-01612-0&v=FaskrtGQEaI

Another Pluto video: • Evidence That Pluto and Triton Are Ac...
View: https://www.youtube.com/watch?v=01-t06fWGeI&t=0s

Giant impact questioned: • Study Suggests Giant Impact Did Not F...
View: https://www.youtube.com/watch?v=2e5Qbz00joc&t=0s

More videos:
View: https://www.youtube.com/watch?v=MIzqUV4MSJg&t=0s

• Distant Objects In The Solar System M...
• Exciting Discoveries About Dwarf Plan...
• 90482 Orcus - Pluto's Mirror Image - ...
View: https://www.youtube.com/watch?v=2ZdD4j4Z4is&t=0s


#pluto #charon #kuiperbelt
Click to expand...
0:00 New discoveries about Pluto and Charon
1:20 Pluto system and why it's a mystery
3:05 Previous assumptions and why they may have been wrong
4:10 New analysis and discoveries
5:35 Common in the Kuiper belt?
6:50 Why this scenario makes sense and how it was discovered
8:20 Additional confirmations and conclusions
9:30 More questions?
Click to expand...

You could say that Pluto and Charon are kissing planets;):D.
 
Last edited:
Expanse said:
Would you like to join my team for design a starship?
Click to expand...
Well, my skills fall just the wrong side of the pen versus the CAD revolution, since I opted for an academic/dilettante 'career' way back. Your submission will require someone with up to date technical skills - and my autistic temperament is not well suited to keeping to deadlines either. Still, I'd be happy to consult! I think that this would be a good thread to set up on this forum considering the vast amount of talent available. 'Lets design a starship habitat' would be a great topic. Start with basics like structure, artificial gravity, then systems resilient over centuries...
 
Last edited:
X-ray flashes from a nearby supermassive black hole accelerate mysteriously

The astronomers have detected flashes of X-rays coming from the black hole at a steadily increasing clip. Over a period of two years, the flashes, at millihertz oscillations, increased in frequency from every 18 minutes to every seven minutes. This dramatic speed-up in X-rays has not been seen from a black hole until now.

The researchers explored a number of scenarios for what might explain the flashes. They believe the most likely culprit is a spinning white dwarf — an extremely compact core of a dead star that is orbiting around the black hole and getting precariously closer to its event horizon, the boundary beyond which nothing can escape the black hole’s gravitational pull. If this is the case, the white dwarf must be pulling off an impressive balancing act, as it could be coming right up to the black hole’s edge without actually falling in.
Click to expand...

…

If a white dwarf is at the root of the black hole’s mysterious flashing, it would also give off gravitational waves, in a range that would be detectable by next-generation observatories such as NASA’s Laser Interferometer Space Antenna (LISA).

“These new detectors are designed to detect oscillations on the scale of minutes, so this black hole system is in that sweet spot,” says co-author Erin Kara, associate professor of physics at MIT.
Click to expand...

…

The white dwarf is practically at the precipice of no return and is estimated to be just a few million miles from the event horizon. However, the researchers predict that the star will not fall in. While the black hole’s gravity may pull the white dwarf inward, the star is also shedding part of its outer layer into the black hole. This shedding acts as a small kick-back, such that the white dwarf — an incredibly compact object itself — can resist crossing the black hole’s boundary.

“Because white dwarfs are small and compact, they’re very difficult to shred apart, so they can be very close to a black hole,” Kara says. “If this scenario is correct, this white dwarf is right at the turn around point, and we may see it get further away.”
Click to expand...


Related paper:

 
While the black hole’s gravity may pull the white dwarf inward, the star is also shedding part of its outer layer into the black hole. This shedding acts as a small kick-back, such that the white dwarf — an incredibly compact object itself — can resist crossing the black hole’s boundary.
Click to expand...

I wonder what the White-dwarf will turn into as it sheds mass and starts to decompress?
 
publiusr said:
Most of them are carbon/oxygen as per Wiki, (super-diamonds?)

Some are oxygen/neon/magnesium--and a handful are helium white dwarves.
Click to expand...

Given that there is a LOT of trapped residual heat in the interior of a white-dwarf (They take a very long time to cool down) I strongly suspect that as mass is stripped off of it reducing its' mass and hence gravity well. The white-dwarf may end up explosively "Decompressing" turning into a brown-dwarf then a gas-giant probably being reduced to something akin to a terrestrial planet.
 
First-ever detection of a mid-infrared flare in Sagittarius A*, the Milky Way's supermassive massive black hole

Using the MIRI instrument onboard the James Webb Space Telescope, an international team of scientists made the first-ever detection of a mid-IR flare from Sagittarius A*, the supermassive massive black hole at the heart of the Milky Way. In simultaneous radio observations, the team found a radio counterpart of the flare lagging behind in time. The paper is published on the arXiv preprint server.
Click to expand...


Related paper:

 
Interesting Flyaway, is this Sagittarius A* starting to become active again or is it possibly just a one of event?
 

Similar threads

Please donate to support the forum.

Back
Top Bottom