A century of general relativity: Astrophysics and cosmology

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Science  06 Mar 2015:
Vol. 347, Issue 6226, pp. 1103-1108
DOI: 10.1126/science.aaa4033

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  • RE: A century of general relativity: Astrophysics and cosmology R. D. Blandford Science 06 Mar 2015: Vol. 347, Issue 6226, pp. 1103-1108 DOI: 10.1126/science.aaa4033

    Title -
    General Relativity eliminates Dark Energy, Dark Matter and Universal Expansion

    Abstract -
    This letter is suggesting that dark energy, dark matter and universal expansion are intimately related. However, they aren't viewed as revolutions in cosmology which are essential to a complete understanding of the modern universe. They are instead viewed as properties which need to be added to the cosmos when Einstein's theory of gravity (General Relativity) is apparently still not thoroughly comprehended a
    little over a century after it was published.

    Letter -
    General Relativity says gravity is a push exerted by the curvature of spacetime. "(Bodies) merely follow the line of least resistance through the hills and valleys of the curved space that surrounds other bodies. Objects that fall to the earth, for example, are not "pulled" by the earth. The curvature of space-time around the earth forces the objects to take the direction on toward the earth. The objects are
    pushed toward the earth by the gravitational field rather than pulled by the earth." (1) (I've also heard the modern physicist Michio Kaku agree that gravity is a push.)

    So the Dark Energy giving the universe a push just doesn't seem necessary. Dark Energy is only required if we continue clinging to the Newtonian view that, instead of pushing objects together, gravity is a mysterious force whereby objects pull themselves to...

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    Competing Interests: None declared.

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