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Paper questions theory of Dark matter.

I newer knew or understood what dark matter was meant to be anyway. But I can't really work out what the problem was that he solved.
We reckon the Earth is influenced by the Suns gravitational pull, we reckon space is a vacuum, so didn't we already reckon gravity exists without matter anyway, travelling through space before affecting Earth?
What am I missing here?

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puff 8 Sep 13
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I can't answer your question, but it is a good one.

Something from the article I am now trying to understand is if dark matter is gravity, then why is the Universe expanding?

Because things spin . Orbit each other. Things go outwards,
Because space is a vacuum which means nothings is there so no matter, but gravity passes through it, it's because things spin. Why, fucked if I know. Just happens when you spin shit.. Atoms do it, Everything seems to orbit stuff in the universe.

@puff Earth spins and we don't fly off.

@Alienbeing isn't that gravity? If it didn't spin, no gravity and we would fly off, or drift off.

@puff I used to believe that the spin had to do with our gravity but these days I do not know for sure. I do not know the answer to the question.

@DenoPenno You're not alone. Oh well, for the time being I'll agree with Buddha on this one. "Just is".

@puff The spin is unrelated. Gravity is there because of the mass of Earth. The larger the planet (or celestial body) the more gravity. Mars is smaller than Earth. Earth has more gravity. Our Sun is the largest body in our solar system, and accordingly it hs the highest gravity pull.

@Alienbeing Yes, but everything is spinning around something and spinning themselves, except for the things that don't. Like if none of the planets spun or orbited anything, would there be gravity?
Beyond me to prove anything, just guessing because atoms and stuff are doing orbits like galaxy's and "bond", by mini gravity I suppose, dunno. I'll stop before I dig a hole too deep.

@puff The moon does not spin yet it has some gravity. Aneroids have be shown to have some gravity also. perhaps because they do spin? Or are caught in the gravitational forces of solar systems or gravity from planets? Perhaps , with an ample dose of weed and LSD we may gain some ideas? Works for shamans of most cultures, why not ours???

@vocaloldfart Fucked if I know. Swings and roundabouts, spins and orbits.

@puff I know weed and LSD would make my head spin, and yes could create a grave assault upon my gravity.

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