Space

Sun's tilt attributed to influence of unseen Planet Nine

Sun's tilt attributed to influence of unseen Planet Nine
Caltech scientists say the previously unexplained tilt of the Sun is a direct result of the gravitational influence of a massive hidden planet
Caltech scientists say the previously unexplained tilt of the Sun is a direct result of the gravitational influence of a massive hidden planet
View 3 Images
Caltech scientists say the previously unexplained tilt of the Sun is a direct result of the gravitational influence of a massive hidden planet
1/3
Caltech scientists say the previously unexplained tilt of the Sun is a direct result of the gravitational influence of a massive hidden planet
According to the Caltech researchers, the angular momentum of Planet Nine is exerting an influence on the Solar System because of its position at about a 30-degree angle to the orbital plane
2/3
According to the Caltech researchers, the angular momentum of Planet Nine is exerting an influence on the Solar System because of its position at about a 30-degree angle to the orbital plane
A predicted consequence of Planet Nine, according to Caltech researchers, is that a second set of confined objects should also be orbiting the Solar System
3/3
A  predicted consequence of Planet Nine, according to Caltech researchers, is that a second set of confined objects should also be orbiting the Solar System
View gallery - 3 images

Planet Nine, the enigmatic body supposedly loitering somewhere in the furthest reaches of our solar system, has had one more set of observations attributed to it in what Caltech scientists consider the most definitive proof of its existence to date. In this latest work, the researchers claim that the previously unexplained tilt of the Sun itself is a direct result of the gravitational influence of this yet-to-be-observed world and further verification of its presence.

Much speculation has been made about Planet Nine since Caltech scientists first espoused the possibility of its existence, from where it may have come from to theories on its construction. Now large perturbations in trans-Neptunian/Kuiper belt objects announced earlier this year has led to this latest research explaining the strange tilt of the Sun in respect to the orbital plane of the planets.

According to the Caltech researchers, the angular momentum of Planet Nine is exerting an influence on the Solar System because of its position at about a 30 degree angle to the orbital plane and its enormous mass of around 10 times that of the Earth. Spinning about the Solar System at a distance of some 700 AU from the Sun, Planet Nine exerts a small, but influential, sway on the overall spin of the Solar System.

According to the Caltech researchers, the angular momentum of Planet Nine is exerting an influence on the Solar System because of its position at about a 30-degree angle to the orbital plane
According to the Caltech researchers, the angular momentum of Planet Nine is exerting an influence on the Solar System because of its position at about a 30-degree angle to the orbital plane

By tugging at the other planets, it is theorized that Planet Nine pulls the entire spinning disk of bodies slightly out of their flat plane, to some six degrees away from horizontal 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," says Elizabeth Bailey, graduate student at Caltech and lead author of the study.

The observed influence on the orbit of a great proportion of objects in the Kuiper Belt is how Caltech scientists first came to suspect a planet existed somewhere in the outer edges of the Solar System, but the tilt of the Sun that had perplexed astronomers for decades was the real clincher. Because, in a standard, spinning solar system, the angular momentum of the planets would ordinarily be expected to form a flat plane more or less horizontal in relation to the star around which they are orbiting, such a large tilt to our system is almost certainly due to the effect of an external massive body.

"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 Konstantin Batygin, assistant professor of planetary science at Caltech.

The results of the research will be presented at the 48th meeting of the Division for Planetary Sciences (DPS) and 11th European Planetary Science Congress (EPSC) in Pasadena, California, 16 - 21 October.

The video shown below is a Q&A with Caltech astronomers discussing their theory.

Source: Caltech

Planet Nine Tilts the Sun! Q&A with Caltech Astronomers

View gallery - 3 images
8 comments
8 comments
LaylaShade
Sorry, but "its enormous mass of around 10 times that of the Earth" can't be right. A mass ten times Earth's is not 'enormous' by any planetological standards. For reference, Jupiter has almost 318 times Earth's mass. That might qualify as enormous (it's still not, given a planet could theoretically have about 13 times Jupiter's mass).
If those Caltech scientists really claim 10 Earth masses is enormous, odds are everything else about their research is bunk, too; if they claim something that actually makes sense, you need to correct the article accordingly.
over_there
Although possible this could very likely be an example of scientists thinking what could exist to explain what they dont undertstand then being sure it exists because it explains what they dont undertsand much like climate scientists.
Bruce H. Anderson
If Planet Nine is that big, and that close, I wonder how it could have escaped observation for so long. Especially since finding a new habitable exoplanet way out yonder seems to be a regular occurrence. Is it made of black-hole dark matter stuff that we can't detect? Planet Nine from Outer Space. It has a nice ring to it.
socalboomer
LaylaShade - I think they're meaning it comparatively and then as a lever (one of them mentions the huge angular momentum as being a big lever).
Rocky Stefano
@LaylaShade, its called looking for next year's budget.
Kpar
So the Sun is tilted 6 degrees to the ecliptic? Isn't it more logical to say the ecliptic is tilted to the Sun? After all, look at the relative masses- the Sun has 99.8 percent of the mass of the system as a whole.
Nathaneal Blemings
the only way we see exoplanets when they are outside our solar system is when they pass infront of a star... this planet never passes infront of a star nor is it close enough to the sun to be luminous... also it probably has a very long transit time.
Bob
I'm surprised they aren't claiming it to be dark matter. How about simply that another star passed by sometime in the distant past?