Planet 9 | Name of the ninth planet

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  • A smaller planet like Earth or Mars could have been pushed to the edge of our solar system (or into deep space), according to a new paper.
  • Scientists think Planet 9 was more like Planet 6 or 7, meaning it once swirled among the gas giants before they finally knocked it out of orbit.
  • The solar system has three zones: the inner planets, the outer planets, and what lies beyond.

    Scientists believe that there could be a ninth planet in our solar system, hidden somewhere beyond Neptune, but don’t get too excited, because that is not about Pluto.

    Rather, it is the story of a mysterious planet the size of Earth or Mars that may have swirled beyond the asteroid belt, among the gas giants, before they finally swept across this Potential “Planet 9” towards the far reaches of our solar system. or even deep space. The theory makes sense at first glance: Jupiter is somewhat known as a bully, after all.

    That’s according to two researchers from the University of British Columbia and the University of Arizona who studied various computer simulations depicting the evolution of our solar system. Their findings are presented in a new paperpublished last month in the Annual journal of astronomy and astrophysics.

    In it, scientists speculate that there is something missing from these models, such as the fact that our solar system would have four gas giants in a row (Jupiter, Saturn, Uranus, and Neptune) and then no other planets after that other. than small, irregular dwarf planets like Pluto.

    “Logic suggests that there should be planets of other sizes, and their simulations confirm this,” Phys.org reports. “Adding another Earth- or Mars-sized planet to the outer solar system, perhaps between two of the gas giants, produces a more accurate pattern, at least during the early stages of development.”

    The new research focuses on the initial position of this “Planet 9” – a common name for the loose collection of hypotheses about a potential ninth planet outside the core zone of our solar system. Planet 9 could be a black holefor example, or it could be 10 times the size of Earth.

    Specifically, the article focuses on the possibility that the four gas giants pushed Planet 9 to the edge of the solar system. The planets exert gravity on each other, which is part of why experts suspect Planet 9 exists in the first place.

    How could the gas giants hunt a much smaller and much denser planet, then? Jupiter above all already acts as an orbiting linebacker, deflecting smaller objects like comets or meteors as they approach the solar system. (This is one of the many reasons why a Melancholy-as Rogue Planet is extremely unlikely.)

    solar system
    The gas giants (left to right: Jupiter, Saturn, Uranus, and Neptune) may have pushed Planet 9 to the edge of our solar system, or beyond into deep space.

    Nasa

    The scale of our solar system appears even larger if you consider where Planet 9 is roughly thought to exist. First, there is the inner zone of the planets, where Mercury, Venus, Earth and Mars are grouped relatively tightly. Next is the asteroid belt.

    From there, the scale zooms out to accommodate Jupiter, Saturn, Uranus, and Neptune, all gas giants that are much farther apart. Neptune may look small among these titans (see image above), but is still several times the mass of Earth, and large enough to put 57 Earths inside By volume.

    After that is the Kuiper Belt, full of icy rocks and other small objects. Pluto is the star of this so-called third zone, a huge expanse dotted, so far, with dwarf planets and other celestial bodies like comets. This is where scientists get stuck, because it seems so unlikely that the evolution of our solar system will only spew out four very similar gas giant cores and then stop.

    How do we actually find Planet 9 if it exists? These scientists posit that increasingly powerful telescopes could bring us some closure in the near future. Otherwise, a string theorist come up with something a little wild last year: a network of tiny probes that would cover the third zone in order to shake up all the elements – like the larger planets or even the primordial black hole – that some scientists believe is Planet 9.

    Correction, October 9, 2021: A previous story incorrectly referred to the asteroid belt as the Kuiper belt. In fact, the Kuiper Belt is a disk containing comets, asteroids, and dwarf planets beyond Neptune’s orbit.


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