Planet Nine tagged posts

There’s one last place Planet Nine could be Hiding

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

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

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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Collective Gravity, not Planet Nine, may explain the Orbits of ‘detached objects’

An artist's rendering of Sedna, which looks reddish in color in telescope images. (Credit: NASA/JPL-Caltech)

An artist’s rendering of Sedna, which looks reddish in color in telescope images. (Credit: NASA/JPL-Caltech)

 
Bumper car-like interactions at the edges of our solar system – and not a mysterious ninth planet – may explain the dynamics of strange bodies called “detached objects,” according to a new study. CU Boulder Assistant Professor Ann-Marie Madigan and a team of researchers have offered up a new theory for the existence of planetary oddities like Sedna. This minor planet orbits Earth’s sun at a distance of 8 billion miles but appears separated from the rest of the solar system.
 
One theory for its unusual dynamics is that an as-of-yet-unseen ninth planet beyond Neptune may have disturbed the orbits of Sedna and other detached objects...
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