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Thread: Can someone explain, plain and simple, Dark Energy

  1. #1 Can someone explain, plain and simple, Dark Energy 
    Forum Freshman
    Join Date
    Oct 2009
    Question is put simply in the question. I know it is a tough subject to tackle with a short response, but I've got a friend of mine who I'm having trouble explaining how it's exponential expansion based on the amount of space works etc.


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  3. #2  
    Forum Professor
    Join Date
    Oct 2006
    In physical cosmology, astronomy and celestial mechanics, dark energy is a hypothetical form of energy that permeates all of space and tends to increase the rate of expansion of the universe.[1] Dark energy is the most popular way to explain recent observations that the universe appears to be expanding at an accelerating rate. In the standard model of cosmology, dark energy currently accounts for 74% of the total mass-energy of the universe.[2]

    To get you started; but keep in mind the word 'hypothetical' and the implied need to understand expansion...Since there is no definitive definition, it would seem hard to explain to anyone. You might ask your friend if he/she thinks expansion continues from with in the U, then what might be causing the thought faster acceleration of that expansion. One theory;

    During a press conference today, NASA announced the fact that new measurements from the Chandra X-Ray Observatory confirm the existence of "dark energy" that is causing the universe to expand - and disintegrate at an incredible speed. It is as if the force that is speeding up the expansion of the universe is also stunting the growth of the objects inside it. Sheer paradox. The scary thing is that this is what’s really happening, according to astronomers’ announcement on Tuesday.

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