from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Insufficiently dense


from Wiktionary, Creative Commons Attribution/Share-Alike License

under- +‎ dense


  • Thus the slightly larger expansion rate of the underdense regions makes the measured expansion rate appear to accelerate.

    Dark Matter: Still Existing

  • The idea here is that as structure forms, your overdense regions become smaller, while your underdense regions become larger.

    Dark Matter: Still Existing

  • With a cosmological constant, for instance, the potential becomes shallower as the light traverses it, so the blueshifting as it goes in outpaces the redshifting as it comes out, making for a small blueshifting of the light as it passes through overdense regions, and a small redshifting as it passes through underdense regions.

    A Dark, Misleading Force


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