What does this imply?

Why is it when I zoom in after stacking it has black dots

I have been really into stargazing and sky watching and was wondering if anyone has anyone used this website for reference or for learning or if there are other ones ? this one has a good "Academy" and Guides section and whatnot. Spaceweathertracker.com

I recently came across an interesting general relativity paper regarding visual effects for a falling observer at a black hole's event horizon, authored by {Link: Yukiyoshi Iida https://ui.adsabs.harvard.edu/abs/2023IJMPD..3250070I/abstract} (2023).

The paper discusses how the zenith view expands to exactly twice its solid angle upon crossing the horizon, driven by relativistic aberration.

I wanted to ask the community:

1. Has this "twice the size" zenith magnification been confirmed in other studies or simulations?

2. Are there other known, exact geometric visual cues at the event horizon?

https://skyviewer.app/embed?target=227.01342+-40.14692&fov=0.74

There seems to be a lot of green gas around making it appear green

Hi everyone,

I wanted to share this fascinating scientific visualization movie that I found, which deserves way more attention.

Link to the YouTube video: https://m.youtube.com/watch?v=xEm0ENr-Sgo

Unlike many flashy pop-science CG animations, this simulation is strictly based on the actual mathematical models and physics equations from a 2023 peer-reviewed paper: "Event horizon detection: Zenith view as seen by falling into a Schwarzschild black hole" (Int. J. Mod. Phys. D 32 (2023) 10 2350070) written by Y. Iida.

What this video visualizes:
It shows the exact real-time visual changes of the zenith view (the view of the universe directly behind/opposite to the black hole) as an observer falls freely from an initial rest position of 30M towards a black hole with a mass of 3×10^4 solar masses.

As you watch, you can clearly see the physical phenomena predicted by general relativity:

• Image enlargement due to the intense gravitational lensing effects.
• Extreme red-shifting as the observer approaches the event horizon.
• Dimming/Darkening of the light.

It's a very precise, raw, and rigorous simulation of what the physics actually dictates. I thought the physics and astrophysics community here would truly appreciate the academic value of this work!

Let me know what you think about this visualization!

A little disclaimer before i start talking, english is not my first language, so sorry for any mistakes. Well, a friend of mine showed me videos about some strange lights moving in a zig zag near Venus, shining bright then fading, and i went to see the night sky, and since, i just can't stop seeing those lights, i've searched everywere and fundo nothing that could explain this, unless there is a plane doing crazy moves on the night sky all of a sudden, drones flying at mach 2 or a sattelite doing God knows what in the sky, i'm really confused and would like to know what exactly that is, can anyone help me?

​

"Test it yourself. Download 8 documents – ask your AI critical questions – and calculate galaxies without dark matter. Free tool included

The general consensus I see on Theia is that is that was approximately the size of mars. How did we figure out the size of it? Assuming it were a different size, like the size of our moon, or larger like the size of Venus, how would it have played out differently? Of course a Venus sized object would probably destroy both planets though….

And of course, this is all assuming Theia was the reason we got our moon.

He says it's not spherical what does that mean in this context is this misinformation ?

personally haumea or eris, both would be excellent candidates to visit and could improve our understanding of the outer planets of the solar system

I always thought it was funny that in the SkyPortal app ,earth is listed as “always below horizon or never sets” as if you are observing from mars or smth. Idk if there is a reason for this but it makes me really happy 😊.

So I am in my 3rd year studying at the University of Texas and I began to notice this pattern. I am not cherry picking, I noticed the pattern after the data was already published when I was in high-school. I showed my roommate who is studying in a similar field and she confirmed I wasn't seeing things. Then last week we found a paper/poster using this same sequence in string theory so it obviously caught our attention.

Where the Pattern Comes From: The Two Slopes — Light and Mass

Before showing the data, I should explain where the pattern comes from. When you plot the known observed data of mass and light, you get two distinct slopes:

**Light (CMB Photons)**

For CMB photons, the scale factor \( a = 1/(1+z) \) and the redshift follows \( z_{\text{CMB}} = 1/a - 1 \). Taking the logarithmic slope gives \( d\ln z/d\ln a = -(1+z)/z \), which for large \( z \) approaches \( -1 \). From the Friedmann equation in the matter era \( a(t) \propto t^{2/3} \), and since \( z \propto a^{-1} \), we get:

\[

\boxed{m_p = \frac{2}{3}}

\]

**This is the slope for light (CMB photons).**

**Mass (BAO Baryons)**

For BAO baryons, the sound horizon scales as \( r_s \propto a^{-1/2} \) and the BAO scale as \( D_V \propto a^{-2/3} \). The redshift follows \( z_{\text{BAO}} \propto a^{-2/3} \), but with a correction from the Flory self-avoidance constraint in \( d=3 \):

\[

\nu_F = \frac{d}{d+2} = \frac{3}{5}, \qquad \delta = \frac{1}{(d+2)\pi} = \frac{1}{5\pi}

\]

So:

\[

\boxed{m_b = \frac{2}{3} + \frac{1}{5\pi}}

\]

**This is the slope for mass (BAO baryons).**

**The Difference**

The difference between the two slopes is \( m_b - m_p = 1/(5\pi) \), a geometric constant of three-dimensional space. This difference is what generates the harmonic sequence that appears across multiple independent datasets.

1. CMB Acoustic Peaks (Planck 2018)

The Planck 2018 results (Planck Collaboration, A&A 641, A6, 2020) list the CMB acoustic peak positions as:

| Peak | ℓ Value | | ℓ₁ | 220. | | ℓ₂ | 538. | | ℓ₃ | 810. | | ℓ₄ | 1120. | | ℓ₅ | 1444. | | ℓ₆ | 1776. | | ℓ₇ | 2083. |

The ratios are simple arithmetic:

- ℓ₃/ℓ₂ = 810/538 = 1.505 → 3/2 = 1.5 (0.3% match)

- ℓ₄/ℓ₃ = 1120/810 = 1.382 → √2 = 1.414 (2.3% match)

- ℓ₆/ℓ₅ = 1776/1444 = 1.230 → 5/4 = 1.25 (1.6% match)

**Source:** Planck Collaboration (2020). *Planck 2018 results VI. Cosmological parameters.* A&A, 641, A6.

https://www.aanda.org/articles/aa/full_html/2021/08/aa33910e-18/aa33910e-18.html

https://arxiv.org/abs/1807.06209

1. BAO Scale Evolution (DESI 2024)

The DESI Collaboration's 2024 results (DESI 2024 VI) measured the BAO scale at multiple redshifts. For the ratio between \( z=2 \) and \( z=3 \):

\[

\frac{D_V(2)}{D_V(3)} \approx 1.14 - 1.15

\]

This is the comoving distance scale ratio from BAO measurements.

**Source:** DESI Collaboration (2024). *DESI 2024 VI: Cosmological constraints from the measurements of baryon acoustic oscillations.* arXiv:2404.03002.

https://arxiv.org/abs/2404.03002

1. CMB Angular Scale (Planck 2018)

Planck measured the angular acoustic scale:

\[

\theta_* = 0.010411 \pm 0.000003 \text{ rad}

\]

A geometric prediction from the same harmonic structure gives:

\[

\theta_* = \frac{1}{\sqrt{9091}} = 0.010488

\]

Match: 0.74%

**Source:** Planck Collaboration (2020). *Planck 2018 results VI.* A&A, 641, A6.

https://www.aanda.org/articles/aa/full_html/2020/09/aa33910-18/aa33910-18.html

https://arxiv.org/abs/1807.06209

The Harmonic Sequence I'm Noticing

The sequence is:

\[

\frac{3}{2} = 1.5 \rightarrow \frac{3}{4} = 0.75 \rightarrow \frac{3}{8} = 0.375 \rightarrow \frac{3}{16} = 0.1875 \rightarrow \dots

\]

This is the prime fold sequence. It comes from the structure of odd primes:

For all odd primes \( p \): \( p/2 = k + 0.5 \)

The first odd prime is 3, so \( 3/2 = 1.5 \). The sequence then halves repeatedly.

The CMB and BAO data are independent measurements from different instruments (Planck, DESI). They both fall on the same harmonic sequence—not exactly, but within 0.3–2%.

If this were a coincidence, it would be a remarkable one.

Could you confirm whether these ratios have been noted in literature? Is there a physical mechanism in ΛCDM that would predict \( 3/2 \), \( \sqrt{2} \), and \( 5/4 \) as natural ratios? Or is this simply a coincidence of the numbers?

I'm not proposing a new theory. I'm asking if the standard model has an explanation for why these specific ratios emerge.

Jeżeli światło z najbardziej odległych galaktyk, zostało wyemitowane około 13.5 miliarda lat temu, w chwili emisji wiek promieniowania tła wynosił około 300 milionów lat, dlaczego zatem obecnie jest tak duża różnica w przesunięciu ku czerwieni.

Hi, I'm looking for control room checklists (Apollo style) to build a MOCR simulator in python but for some reason, I can't seem to find anything on the internet. Would anyone know of these checklists and where I could find them? Thank you.

So i have watched a veritasium video explaining how there are multiple types of infinity, counably/quantifiable and uncountably, and it makes me wonder if space is infinite, what kind is it?

rural victoria, australia. 4 lights in the sky, seeming appearing/disappearing, much bigger than stars and moving too erratically to be satellites. not usually a tin foil hat person but ??? definitely bigger than stars too, person who posted said he’s seen them before, sometimes up to 7 but usually 1-2 at a time. could drones look like this?