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Please really think of what I mean before you answer.

Thanks in Advance!

- Thread starter T.O.E Dream
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- #1

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Please really think of what I mean before you answer.

Thanks in Advance!

- #2

mathman

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ideasrule

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The fact that galaxies are moving away from each other is no mystery; they're moving away because gravity either cannot, or has not yet, halted the universe's expansion. The mystery is that this expansion is accelerating.

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diazona

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Just to clarify one more item [tex]\Omega[/tex] actually consists of a bunch of varieties including but not limited to: [tex]\Omega_M[/tex] for ordinary matter and including Dark Matter, [tex]\Omega_R[/tex] for radiation density, and [tex]\Omega_\Lambda[/tex] for the Cosmological constant and Dark Energy. The total of all these densities comes out to the final value of [tex]\Omega[/tex] which if as diazona said is either > 1, or = 1, or < 1, will determine the fate of the universe (essentially).

As such more than a decade back we had no idea about dark energy and probably hadn't even thought of the term to coin it, so the values for these densities are changing and variants of the densities will surely pop up in the future as we determine more and more about the ingredients of the universe. This in itself is the basis of cosmology.

As for gravity mixing into this recipe, we are not sure about its overall or future effect on the expansion of the universe. There are a few instruments I believe that will be going up (or are already up) and measuring gravity waves and searching for gravitons and other elusive physical particles. Hell we barely even know how gravity works here on Earth or other bodies. Wtf exactly is causing us to be pulled backwards towards the ground whenever we jump or shoot missiles at other countries?

For now we just play the waiting game

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