Dark energy is the unknown form of energy that drives the acceleration of the universe's expansion.

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What is our confidence with respect to the critical density of the universe? [closed]

How can scientists speak confidently about the critical density of the universe while knowing the majority of matter and energy is foreign and not well understood. Shouldn't more knowledge about dark ...
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When will galaxies become unstable due to dark energy?

When will galaxies become unstable due to dark energy? What will it be like for a civilization to observe their own galaxy going through this period of instability?
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Isn't the accelerating expansion of the universe intuitive?

I have a question about accelerating expansion of the universe. My understanding is that Hubble said the farther our we look into the universe, the higher the redshift, therefore the faster things ...
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How does the Higgss field change with the expanding universe?

Does the expanding universe really have an effect on the Higgs field? Say, is it like the matter getting diluted with the expanding universe? Or does the expansion does not have any effect on the ...
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Does this analogy with matter and energy hold? [duplicate]

Matter is to energy as dark matter is to dark energy. Is that statement correct? If not, is there any relationship, that we know of, between dark matter and dark energy? When I say there is an ...
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Is Dark Energy and or Dark Matter directly proportional to EMR? [closed]

Is Dark Energy directly proportional to Electromagnetic radiation (EM radiation or EMR)?
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Is dark energy homogeneous and/or isotropic?

Shouldn't there be at least some fluctuations of dark energy in various regions, analogous to the fluctuations we observe in other forms of energy like matter?