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Astronomers discover giant cosmic sheet around the Milky Way
General • March 5, 2026
For
decades,
astronomers wondered why most
nearby galaxies are
speeding away from the Milky Way instead of being pulled in by its gravity. New simulations reveal the answer: our galaxy sits in a gigantic, flat sheet of matter surrounded by huge empty voids. This hidden structure—dominated by dark matter—balances gravitational forces and lets neighboring galaxies drift outward. The discovery finally explains the puzzling motions of galaxies just beyond our Local Group.
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