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    Astronomers may have discovered first planet to orbit 3 star - Forum

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    Forum moderator: arya, dethalternate  
    Forum » Main » Science, Astronomy, Nature » Astronomers may have discovered first planet to orbit 3 star
    Astronomers may have discovered first planet to orbit 3 star
    ManuDate: Tuesday, 05-October-2021, 6:01 PM | Message # 1
    --dragon lord--
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    Astronomers may have discovered first planet to orbit 3 stars

    by University of Nevada, Las Vegas

    UNLV researchers and colleagues may have identified the first known planet to orbit three stars.

    Unlike our solar system, which consists of a solitary star, it is believed that half of all star systems, like GW Ori where astronomers observed the novel phenomenon, consist of two or more stars that are gravitationally bound to each other.

    But no planet orbiting three stars—a circumptriple orbit—has ever been discovered. Perhaps until now.

    Takeaways

    Using observations from the powerful Atacama Large Millimeter/submillimeter Array (ALMA) telescope, UNLV astronomers analyzed the three observed dust rings around the three stars, which are critical to forming planets.

    But they found a substantial, yet puzzling, gap in the circumtriple disc.

    The research team investigated different origins, including the possibility that the gap was created by gravitational torque from the three stars. But after constructing a comprehensive model of GW Ori, they found that the more likely, and fascinating, explanation for the space in the disc is the presence of one or more massive planets, Jupiter-like in nature. Gas giants, according to Jeremy Smallwood, lead author and a recent Ph.D. graduate in astronomy from UNLV, are usually the first planets to form within a star system. Terrestrial planets like Earth and Mars follow.

    The planet itself cannot be seen, but the finding—highlighted in a September study in the Monthly Notices of the Royal Astronomical Society—suggests that this is the first circumtriple planet ever discovered. Further observations from the ALMA telescope are expected in the coming months, which could provide direct evidence of the phenomenon.

    untotenawake
    read more/full article/source -
    https://phys.org/news/2021-10-astronomers-planet-orbit-stars.html
     
    Forum » Main » Science, Astronomy, Nature » Astronomers may have discovered first planet to orbit 3 star
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