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The Hidden Lives of Galaxies - Page 21

Possibilities   Pros  up  and Cons  down

MACHOs (Massive Compact Halo Objects)

  • Neutron Stars & Black Holes
  • White Dwarfs
  • Brown Dwarfs

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WIMPs (Weakly Interacting Massive Particles)

  1. Exotic subatomic particles, such as axions, massive neutrinos, photinos

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Hydrogen Gas

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Assessment: Could Einstein’s Theory of Gravity, which has proved to be correct in all cases so far, be somehow wrong? Justify your answer.

Einstein’s Theory in a Nutshell: Space-time tells matter how to move. Matter tells space-time how to bend.

Decision(s) Reason(s)
   



 

A service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Andy Ptak (Director), within the Astrophysics Science Division (ASD) at NASA/GSFC

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