Cosmology

  1. colliding neutron stars
    Cosmology

    What detecting gravitational waves means for the expansion of the universe

    The latest LIGO signal proves that gravitational waves travel at the speed of light, ruling out a swath of cosmological theories in the process.

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  2. computer simulation of the universe
    Astronomy

    How to make the cosmic web give up the matter it’s hiding

    Half the ordinary matter in the universe is unaccounted for. Astronomers may now have a new way to see it spanning the space between galaxies.

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  3. map of dark matter
    Cosmology

    Map reveals the invisible universe of dark matter

    The Dark Energy Survey reports a new tally of the dark universe.

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  4. MACS J1149
    Astronomy

    The most distant star ever spotted is 9 billion light-years away

    A bright blue star sends its light from two-thirds of the way across the universe, thanks to a chance alignment with a galaxy cluster.

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  5. MACS J1149
    Astronomy

    Astronomers get glimpse of star 9 billion light-years away

    A bright blue star sends its light from two-thirds of the way across the universe, thanks to a chance alignment with a galaxy cluster.

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  6. illustration of LISA satellite
    Astronomy

    Satellite trio will hunt gravitational waves from space

    The European Space Agency has green-lighted the Laser Interferometer Space Antenna, expected to launch in 2034.

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  7. simulation of cosmic void
    Cosmology

    Milky Way’s loner status is upheld

    Galaxy surveys show the Milky Way lives in a vast cosmic void, which could help ease tensions between ways of measuring how fast the universe is expanding.

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  8. Andromeda galaxy
    Science & Society

    Einstein’s latest anniversary marks the birth of modern cosmology

    A century ago, Einstein gave birth to modern cosmology by using his general theory of relativity to describe the universe.

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  9. hydrogen signatures of galaxies
    Astronomy

    Distant galaxies lack dark matter, study suggests

    Slower-than-expected velocities of stars in distant galaxies, if confirmed, could reshape astronomers’ ideas of galaxy formation and evolution.

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  10. illustration of galaxy dust
    Astronomy

    Astronomers detect oldest known stardust in distant galaxy

    The first stardust ever generated in the universe may have been spotted in a distant galaxy, seen as it was 600 million years after the Big Bang.

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  11. Abell 2744
    Astronomy

    Faint, distant galaxies may have driven early universe makeover

    Gravitational lensing has revealed extremely faint galaxies in the early universe, suggesting these tiny galaxies were responsible for cosmic reionization.

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  12. five quasars
    Cosmology

    New data fuel debate on universe’s expansion rate

    Quasar observations add to discrepancy in measurements of the universe’s expansion speed.

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