The thing to me, why do we assume kepler's law applies to galaxies? It has only been proven in relation to the solar system. Perhaps it has been proven to work for the exoplanets in other systems?
Also what exactly is dark matter? Is it some exotic unproven god or is it just dust, hydrogen that just doesnt glow or light up?
What about our observations are just wrong? What if we haven't adjusted our observations for https://en.wikipedia.org/wiki/Local_Interstellar_Cloud and thusly we are slightly off because of some latent glow from the local cloud? Or perhaps even going further and being in some transition to the neighbour cloud is throwing observations off.
However, we have observations which break the rules. https://en.wikipedia.org/wiki/Galaxy_rotation_curve
The thing to me, why do we assume kepler's law applies to galaxies? It has only been proven in relation to the solar system. Perhaps it has been proven to work for the exoplanets in other systems?
Also what exactly is dark matter? Is it some exotic unproven god or is it just dust, hydrogen that just doesnt glow or light up?
What about our observations are just wrong? What if we haven't adjusted our observations for https://en.wikipedia.org/wiki/Local_Interstellar_Cloud and thusly we are slightly off because of some latent glow from the local cloud? Or perhaps even going further and being in some transition to the neighbour cloud is throwing observations off.