The Universe can outrun light without breaking Einstein’s rules

Cosmic expansion allows distant galaxies to move away faster than light, while still letting us see ancient light they emitted when they were much closer. Eventually, accelerating expansion will push nearly every galaxy beyond our Local Group out of sight, making the Universe appear almost empty.

The top 3

  1. Current Hubble Constant Value: Modern estimates for the Hubble Constant, which describes the universe's expansion rate, vary slightly between different measurement methods, with values typically ranging from 67 to 74 km/s/Mpc.
  2. Fastest Cosmic Speedsters: Relativistic jets, ejected from black holes in active galaxies, are the fastest known objects, moving at nearly 99.9% of the speed of light. Gravitational waves also propagate at the speed of light in a vacuum.
  3. The Universe's Ultimate End: Big Rip: The Big Rip is a hypothetical cosmological model where the universe's accelerated expansion eventually tears apart all matter, from galaxies to atoms, due to an increasing dark energy density.

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