Planet Nine Is Tilting the Sun and Wobbling the Solar System Says Caltech Astronomer
The large and distant planet may be adding a wobble to the solar system, giving the appearance that the Sun is tilted slightly.
“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,” says Elizabeth Bailey, a graduate student at Caltech and lead author of a study announcing the discovery.
All of the planets orbit in a flat plane with respect to the Sun, roughly within a couple degrees of each other. That plane, however, rotates at a six-degree tilt with respect to the Sun giving the appearance that the Sun itself is cocked off at an angle. Until now, no one had found a compelling explanation to produce such an effect. “It’s such a deep-rooted mystery and so difficult to explain that people just don’t talk about it,” says Brown, the Richard and Barbara Rosenberg Professor of Planetary Astronomy.
Brown and Batygin’s discovery of evidence that the Sun is orbited by an as-yet-unseen planet that is about 10 times the size of Earth with an orbit that is about 20 times farther from the Sun on average than Neptune’s changes the physics. Planet Nine, based on their calculations, appears to orbit at about 30 degrees off from the other planets’ orbital plane in the process, influencing the orbit of a large population of objects in the Kuiper Belt, which is how Brown and Batygin came to suspect a planet existed there in the first place.
“It continues to amaze us; every time we look carefully we continue to find that Planet Nine explains something about the solar system that had long been a mystery,” says Batygin, an assistant professor of planetary science.
Their findings have been accepted for publication in an upcoming issue of the Astrophysical Journal, and will be presented this week at the American Astronomical Society’s Division for Planetary Sciences 48th annual meeting, held jointly in Pasadena, California, with the 11th European Planetary Science Congress.
The tilt of the solar system’s orbital plane has long befuddled astronomers because of the way the planets formed: as a spinning cloud slowly collapsing first into a disk and then into objects orbiting a central star.
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.
The next question, then, is how did Planet Nine achieve its unusual orbit? Though that remains to be determined, Batygin suggests that the planet may have been ejected from the neighborhood of the gas giants by Jupiter, or perhaps may have been influenced by the gravitational pull of other stellar bodies in the solar system’s extreme past.
For now, Brown and Batygin continue to work with colleagues throughout the world to search the night sky for signs of Planet Nine along the path they predicted in January. That search, Brown says, may take three years or more.
Contacts and sources:
Europlanet Media Centre
Joint 48th annual meeting of the Division for Planetary Sciences (DPS) of the American Astronomical Society (AAS) and 11th annual European Planetary Science Congress (EPSC). Abstract [200.02], The Search for Planet Nine, Michael Brown (Caltech)
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Interesting. Perhaps there is a ninth planet, but what I can’t understand is how they’re able to discover planetary bodies orbiting other suns and supposedly see into other galaxies, yet they can’t say for sure if we have a ninth planet or not—especially if it’s massive (unless ofcourse they’re covering it up, which many on here believe). Anyhow, even if there is, I wouldn’t panic because I doubt it’s going to return in a near earth orbit next month. All they hype about “Nibiru”—even if it does exist which it may—obscures any potential reasonable discussion or facts concerning the matter because of constant “predictions and prophesies” that it’s coming back next month (for going on a decade and a half now).
Sometimes it is easier to see what is far away then what is right under your nose.
Buuuuut, in this case, looking for a planetary body so far away and hidden by (or in) the Oort cloud would be searching for a needle in the hay stack. The hay stack being the size of Jupiter.
Furthermore, this “body” has not been observed so it can be any number of space stuff with enough space-time bending properties.
i guess that if it generates such force able to disrupt in such way the sun and all other solar system bodies, it must be pretty massive but too far or too well hidden to spot
As for Niburu, well, like Saint Thomas, I’ll believe it when I see it But I mean like really seeing it and not some lens flare of any other optical mirages.
They can say they solved it all they want. Till they actually find it it remains a theory. Astronomers have told us about a possible ninth planet before. But failed to find it. I am curious if they can find something now. But until they do I remain skeptical.