Astronomy

  1. Fermi bubble illustration
    Space

    The Milky Way’s giant gas bubbles were seen in visible light for the first time

    Variation in the light’s wavelengths could help scientists map the velocity of the gas that makes up the towering structures known as Fermi bubbles.

    By
  2. illustration of a magnetar
    Space

    A Milky Way flash implicates magnetars as a source of fast radio bursts

    A bright radio burst seen from a magnetar in the Milky Way suggests that similar objects produce the mysterious fast radio bursts observed in other galaxies.

    By
  3. Australian Square Kilometre Array Pathfinder
    Space

    Half the universe’s ordinary matter was missing — and may have been found

    Astronomers have used fast radio bursts as cosmic weigh stations to tease out where the universe’s “missing matter” resides.

    By
  4. Black hole ripping star apart illustration
    Physics

    A star shredded by a black hole may have spit out an extremely energetic neutrino

    A star’s fatal encounter with a black hole might have produced a neutrino with oomph.

    By
  5. artist's illustration of a spiral galaxy called the Wolfe Disk
    Astronomy

    The oldest disk galaxy yet found formed more than 12 billion years ago

    A spinning disk galaxy similar to the Milky Way formed just 1.5 billion years after the Big Bang, much earlier than astronomers thought was possible.

    By
  6. Leo P galaxy
    Space

    How tiny ‘dead’ galaxies get their groove back and make stars again

    Computer simulations explain how puny galaxies can sustain star formation: Gas falls into them and billions of years later begins to create new stars.

    By
  7. Space

    The closest black hole to Earth may have been spotted 1,000 light-years away

    What appears to be the closest black hole to the solar system shares orbits with two massive stars, a new study finds.

    By
  8. Astronomy

    The sun is less magnetically active than similar stars, and we don’t know why

    Why our star seems so different from its stellar kin is a mystery.

    By
  9. Harlow Shapley, Heber Curtis
    Astronomy

    A century ago, astronomy’s Great Debate foreshadowed today’s view of the universe

    The argument between Harlow Shapley and Heber Curtis 100 years ago was ultimately settled by Edwin Hubble.

    By
  10. Astronomy

    High-speed gas collisions prevent star birth in galaxies’ bars

    The spiral galaxy NGC 1300 makes few if any stars in its bright bar. Simulations suggest gas clouds colliding at high speed stunt star formation.

    By
  11. illustration of unequal-sized black holes
    Physics

    Gravitational waves have revealed the first unevenly sized black hole pair

    For the first time, LIGO and Virgo scientists spotted gravitational waves produced when one big black hole merged with a smaller one.

    By
  12. supernova illustration
    Space

    A weird stellar explosion may have caused the brightest supernova yet seen

    Astronomers may have spotted the first known example of a rare “pulsational pair-instability” supernova.

    By