Astronomy

  1. Europa
    Astronomy

    Table salt may be hiding in Europa’s underground sea

    Observations of Europa by the Hubble Space Telescope suggest that the moon’s ice-covered ocean may hold sodium chloride, or common table salt.

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  2. superflare illustration
    Astronomy

    Massive superflares have been seen erupting from stars like the sun

    Older stars, like the sun, can still send out massive bursts of energy that can be seen from light-years away.

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  3. Antilia 2 galaxy
    Astronomy

    Astronomers may have spotted the ghost galaxy that hit the Milky Way long ago

    Astronomers think they’ve identified a galaxy that hit the Milky Way and ruffled its edges millions of years ago.

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  4. solar satellite
    Astronomy

    50 years ago, scientists wanted to build solar panels on the moon

    In 1969, scientists proposed building solar panels on the moon to convert the sun’s energy into electricity that can be used on Earth.

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  5. galaxy clusters Abell 0399 and Abell 0401
    Astronomy

    In a first, magnetic fields have been spotted between two galaxy clusters

    The discovery of magnetic fields in the gaseous filament between two galaxy clusters suggests that some large cosmic structures are magnetized.

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  6. center of Milky Way
    Astronomy

    The accretion disk around our galaxy’s black hole has been spotted at last

    The Milky Way's central black hole has a disk of gas and dust orbiting it, astronomers can finally say with confidence.

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  7. solar eclipse
    Astronomy

    Watch the oldest surviving film of a total solar eclipse

    A short film of the 1900 total solar eclipse was restored by conservation experts and is now available to view online.

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  8. Astronomy

    Questions about solar storms, slingshot spiders and more reader feedback

    Readers had questions about solar storms, a robotic gripper, slingshot spiders and more.

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  9. solar eclipse
    Physics

    100 years ago, an eclipse proved Einstein right. Today, black holes do too — for now

    In 1919, an eclipse affirmed Einstein’s famous general theory of relativity. Now scientists hope to use black holes to poke holes in that idea.

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  10. Very Large Array
    Physics

    Big black holes can settle in the outskirts of small galaxies

    Astronomers have found dozens of surprisingly massive black holes far from the centers of their host dwarf galaxies.

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  11. Ecosystems

    Readers were curious about green icebergs, aliens and more

    Readers had questions and comments about icebergs and climate change, CBD and NASA’s search for E.T.

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  12. gamma ray burst
    Astronomy

    Dying stars called collapsars may forge much of the universe’s gold

    Spinning stars that collapse into black holes could help explain the origins of heavy elements such as gold and silver.

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