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Loading contentAn enormous, nearly empty region of space between the filaments of the cosmic web.
Voids are vast underdense regions, tens to hundreds of millions of light-years across, containing few galaxies. They occupy most of the Universe's volume and are sensitive probes of dark energy and gravity.
Facts on this topic will be cited from these primary and reference sources.
Southern-hemisphere observatory data and imagery (VLT, ALMA partner).
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.