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  1. Astronomy

    Lit-up gas clouds hint at galaxies’ violent pasts

    Voorwerpjes, tendrils of gas that orbit galaxies, continue to glow tens of thousands of years after being blasted with ultraviolet radiation.

    By Christopher Crockett
  2. Astronomy

    Astronomers celebrating Hubble’s past focus on its future

    Astronomers celebrate the 25th anniversary of the Hubble Space Telescope by reflecting on its diversity and looking ahead to the future.

    By Christopher Crockett
  3. Astronomy

    Cosmic threesomes make some galaxies run away

    Extremely rare, free-floating galaxies called compact ellipticals may have been ejected from their home clusters after a massive intergalactic meet-up.

    By Teresa Shipley Feldhausen
  4. Earth

    Massive magma pool found deep below Yellowstone

    Earthquake waves reveal massive magma reservoir deep inside the Yellowstone supervolcano.