Astronomy

  1. Planet Nine illustration
    Astronomy

    Signs of a hidden Planet Nine in the solar system may not hold up

    Hints of a remote planet relied on clumped up orbits of bodies beyond Neptune. A new study suggests that clumping is an illusion.

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  2. illustration of Cygnus X-1 black hole slurping mass off companion star
    Astronomy

    The first black hole ever discovered is more massive than previously thought

    New observations of Cygnus X-1 are leading astronomers to rethink what they know about stars that turn into black holes.

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  3. Nova Persei 1901
    Astronomy

    The number of Milky Way nova explosions per year has been pinned down

    Knowing how frequently these stellar eruptions occur will help determine their contribution to the galaxy’s chemical makeup.

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  4. Illustration of TOI-178 system
    Astronomy

    Two exoplanet families redefine what planetary systems can look like

    The TRAPPIST-1 and TOI-178 systems, both home to multiple bunched-up planets, have densities and orbits that defy expectations.

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  5. Tibet AS-gamma experiment
    Physics

    The Milky Way’s newfound high-energy glow hints at the secrets of cosmic rays

    Gamma rays with energies approaching a quadrillion electron volts emanate from the disk of the Milky Way.

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  6. Kepler-186f
    Space

    Crushed space rocks hint at exoplanets’ early atmospheric makeup

    Experiments that heat crushed-up meteorites are helping astronomers understand what to look for in exoplanet atmospheres.

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  7. cold quasar illustration
    Astronomy

    Astronomers spotted a rare galaxy shutting down star formation

    A distant galaxy harbors an active black hole and active star formation at the same time – an unusual coincidence.

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  8. a flare from a magnetar, illustrated
    Space

    The first magnetar flare detected from another galaxy was tracked to its home

    An outburst from the super magnetic remains of a star suggests similar eruptions are behind some of the most powerful explosions in the universe.

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  9. illustration of quasar J0313-1806
    Space

    The most ancient supermassive black hole is bafflingly big

    The farthest known quasar challenges ideas about how the first supermassive black holes in the universe formed.

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  10. Parker Solar Probe illustration
    Space

    The Parker Solar Probe will have company on its next pass by the sun

    The probe is about to make another close pass of the sun. This time, Solar Orbiter, BepiColombo and others will be watching too.

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  11. Milky Way galactic center
    Astronomy

    The Milky Way’s central black hole may have turned nearby red giant stars blue

    A powerful blast from the supermassive black hole at the Milky Way’s center may explain the lack of large, red stars there.

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  12. Milky Way X-ray bubbles
    Astronomy

    Enormous X-ray bubbles balloon from the center of the Milky Way

    Images from the the eROSITA telescope reveal X-ray–emitting blobs surrounding gamma-ray bubbles.

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