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    Planet Nine tagged posts

    The solar system’s greatest mystery may finally be solved

    June 23, 2025, Categories  Astronomy/Space

    Artist's impression of Planet Nine as an ice giant eclipsing the central Milky Way, with a star-like Sun in the distance. Neptune's orbit is shown as a small ellipse around the Sun. (Credit : Nagual Design)
    Artist’s impression of Planet Nine as an ice giant eclipsing the central Milky Way, with a star-like Sun in the distance. Neptune’s orbit is shown as a small ellipse around the Sun. (Credit : Nagual Design)

    For years, astronomers have been searching for a mysterious ninth planet lurking in the dark outer reaches of our solar system. Now, a team of researchers have taken a completely different approach to this cosmic detective story—instead of looking for reflected sunlight, they’re hunting for the planet’s own heat signature.

    The story begins with a puzzle in the outer solar system. Scientists noticed that small icy bodies called Kuiper Belt Objects, which orbit far beyond Neptune, seem to be clustered together in unusual ways...

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    There’s one last place Planet Nine could be Hiding

    February 21, 2024, Categories  Uncategorized

    Artist’s illustration of Planet Nine with the Sun and orbit of Neptune (ring) in the distance. (Credit: ESO/Tomruen/nagualdesign)

    A study recently submitted to The Astronomical Journal continues to search for the elusive Planet Nine (also called Planet X), which is a hypothetical planet that potentially orbits in the outer reaches of the solar system and well beyond the orbit of the dwarf planet, Pluto.

    The goal of this study, which is available on the pre-print server arXiv, was to narrow down the possible locations of Planet Nine and holds the potential to help researchers better understand the makeup of our solar system, along with its formation and evolutionary processes. So, what was the motivation behind this study regarding narrowing down the location of a potential Planet 9?

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    Exoplanet around Distant Star resembles reputed ‘Planet Nine’ in our solar system

    December 15, 2020, Categories  Astronomy/Space

    This Hubble Space Telescope image shows one possible orbit (dashed ellipse) of the 11-Jupiter-mass exoplanet HD 106906 b. This remote world is widely separated from its host stars, whose brilliant light is masked here to allow the planet to be seen. The planet resides outside its system’s circumstellar debris disk, which is akin to our own Kuiper Belt of small, icy bodies beyond Neptune. The disk itself is asymmetric and distorted, perhaps due to the gravitational tug of the wayward planet. Other points of light in the image are background stars. (Image by NASA, ESA, Meiji Nguyen/UC Berkeley, Robert De Rosa/ESO and Paul Kalas/UC Berkeley and SETI Institute)

    Astronomers confirm bound orbit for planet far from its star, showing that far-flung planets exist...

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    Scientists propose plan to determine if Planet Nine is a Primordial Black Hole

    July 13, 2020, Categories  Astronomy/Space

    Artist’s conception of accretion flares resulting from the encounter of an Oort-cloud comet and a hypothesized black hole in the outer solar system..
    Credit: M. Weiss

    Scientists at Harvard University and the Black Hole Initiative (BHI) have developed a new method to find black holes in the outer solar system, and along with it, determine once-and-for-all the true nature of the hypothesized Planet Nine. The paper, accepted to The Astrophysical Journal Letters, highlights the ability of the future Legacy Survey of Space and Time (LSST) mission to observe accretion flares, the presence of which could prove or rule out Planet Nine as a black hole.

    Dr. Avi Loeb, Frank B. Baird Jr...

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