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So... Maybe the Universe WON'T expand forever?

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35 minutes ago, CO2Neutral said:

Are we talking Dark Matter vs. Dark Energy ... Dark Matter pulls and Dark Energy pushes ... hence the desire to see how much Dark Matter exists and what if they're exactly equal ... is that even possible with the conservation of energy?  Or maybe Dark Energy IS the conservation of energy?

Dark matter is needed to explain why some stars at the outer parts of galaxies move at a different speed than what they should according to Newton. It is relevant at galactic length scales (about 100,000 light years). Dark energy is needed to explain why the universe's expansion is accelerating. It is relevant at cosmic length scales (1 billion light years). Neither concept is directly related to energy conservation, which is a tricky topic in relativity anyway.

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  • Dark matter is needed to explain why some stars at the outer parts of galaxies move at a different speed than what they should according to Newton. It is relevant at galactic length scales (about 100,

On 1/31/2024 at 2:39 PM, Matthew Kane said:

then it retracts to its origin once again creating the next 'Big Bang', and the cycle continues

But retraction is energy, and why should it retract?  And why would there only be one big bang cycle?  There could be many and they could interact with each other … perhaps the interaction is dark energy?  Maybe even multi-dimensional influence perceived as dark energy?  

Edited by CO2Neutral

1 hour ago, CO2Neutral said:

But retraction is energy, and why should it retract?

Gravity?  Similar to how you throw a ball into the air, it goes up, slows down, then accelerates back to earth.

I have my own theory, but it involves 5 spatial dimensions rather than gravity, and I'm still trying to figure out what happens if the speed of light is tied to the speed of the expansion of the universe.  I kinda hope it's not as things get really weird when the expansion stops and reverses.

Hook

Edited by LHookins

Larry Hookins

 

Oh! I have slipped the surly bonds of Earth
And danced the skies on laughter-silvered wings;

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