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Title    The Mysterious ‘Planet Nine’ Might be Causing the Whole Solar System to Wobble
Date    Saturday October 22 2016, @04:23PM
Author    cmn32480
Topic   
from the weebles-wobble-but-they-don't-fall-down dept.
https://soylentnews.org/article.pl?sid=16/10/22/026228

Arthur T Knackerbracket has found the following story:

The massive hypothetical object, which supposedly looms at the edge of our solar system, has been invoked to explain the strange clustering of objects in the Kuiper belt and the unusual way they orbit the Sun.

Now Planet Nine predictors Konstantin Batygin and Mike Brown of Caltech, along with graduate student Elizabeth Bailey, offer another piece of evidence for the elusive sphere's existence: It adds "wobble" to the solar system, they say, tilting it in relation to the sun.

"Because Planet Nine is so massive and has an orbit tilted compared to the other planets, the solar system has no choice but to slowly twist out of alignment," lead author Bailey said in a statement.

Before we go any further, a caveat about Planet Nine: It's purely theoretical at this point. Batygin and Brown predict its existence based on unusual perturbations of the solar system that aren't otherwise easily explained. (This is the same technique scientists used to find Neptune.) But the history of astronomy is rife with speculation that is never borne out: The same guy who correctly predicted the existence of Neptune also believed that a planet he called Vulcan was responsible for the wobble of Mercury. That "discovery" caused the astronomy world to waste years looking for something that wasn't there. (Mercury's wobble was eventually explained by the theory of general relativity.)

But the evidence offered by Batygin and Brown is compelling. When the pair announced their find in January, planetary scientist Alessandro Morbidelli of the Côte d'Azur Observatory in Nice, France, told The Washington Post: "I don't see any alternative explanation to that offered by Batygin and Brown."

"We will find it one day," he added. "The question is when."

edIII writes:

Planet Nine's angular momentum is having an outsized impact on the solar system based on its location and size. A planet's angular momentum equals the mass of an object multiplied by its distance from the sun, and corresponds with the force that the planet exerts on the overall system's spin. Because the other planets in the solar system all exist along a flat plane, their angular momentum works to keep the whole disk spinning smoothly.

Planet Nine's unusual orbit, however, adds a multi-billion-year wobble to that system. Mathematically, given the hypothesized size and distance of Planet Nine, a six-degree tilt fits perfectly, Brown says.


Original Submission #1; Original Submission #2

Links

  1. "following story" - https://www.washingtonpost.com/news/speaking-of-science/wp/2016/10/20/the-mysterious-planet-nine-might-be-causing-the-whole-solar-system-to-wobble/
  2. "massive hypothetical object" - https://www.washingtonpost.com/news/speaking-of-science/wp/2016/01/20/new-evidence-suggests-a-ninth-planet-lurking-at-the-edge-of-the-solar-system/
  3. "Planet Nine predictors" - https://www.washingtonpost.com/news/speaking-of-science/wp/2016/01/20/qa-the-pluto-killer-who-thinks-hes-found-the-true-ninth-planet/
  4. "Batygin and Brown predict its existence" - https://www.washingtonpost.com/news/speaking-of-science/wp/2016/01/20/new-evidence-suggests-a-ninth-planet-lurking-at-the-edge-of-the-solar-system/
  5. "Alessandro Morbidelli" - https://en.wikipedia.org/wiki/Alessandro_Morbidelli_(astronomer)
  6. "edIII" - https://soylentnews.org/~edIII/
  7. "Planet Nine's unusual orbit" - http://phys.org/news/2016-10-curious-tilt-sun-undiscovered-planet.html#jCp
  8. "Original Submission #1" - https://soylentnews.org/submit.pl?op=viewsub&subid=16528
  9. "Original Submission #2" - https://soylentnews.org/submit.pl?op=viewsub&subid=16543

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