This log marks the first public release of my **layered-light interpretation hypothesis** for galactic rotation curves.

In standard cosmology, flat rotation curves are usually interpreted as strong evidence for dark matter. In this project, I explore a different angle: the idea that part of the “anomaly” might come from the way light is blended and scattered inside a spiral galaxy, before it reaches our telescopes.

The core idea is simple to state:

> The light recorded at the visible edge of a galaxy is not purely the light of local outer stars, but a mixture of several structural layers.  
> If bright, fast inner layers contribute enough scattered light along the same line of sight, their Doppler signature can contaminate the outer spectra and artificially increase the *apparent* rotation speed at large radii.

In the **Details** section I present the full argument:  
– how rotation curves are usually measured,  
– why multilayer structure and beam smearing matter,  
– the role of dust and H I gas in building diffuse galactic light,  
– and a simple symbolic formulation for the effect on the inferred velocity.

### Language versions

The full text of the hypothesis is available in three languages:

- **English** – main version, in the *Details* section and as a `.docx` file  
- **French (français)** – see the `.docx` file under the *Files* tab  
- **Persian (فارسی)** – also available as a `.docx` file under *Files*

Feedback is very welcome — especially on:

- physical assumptions that might be missing or oversimplified,  
- possible observational tests or simulations that could confirm or falsify this idea,  
- related work I may have missed in the literature.

Thanks for reading, and feel free to comment or fork the idea if you want to push it further.