Mysterious ‘Planet 9’: Is This the Smoking Gun?

Mysterious ‘Planet 9’: Is This the Smoking Gun?

The furore surrounding the solar system’s theoretical ‘Planet 9’ reached new heights after a University of Michigan researcher discovered evidence that may shed light on the existence of the elusive world beyond Neptune.

Some researchers believe that ‘Planet 9’ exists because of the way certain space phenomena, known as Trans-Neptunian Objects (TNOs), behave. Conspiracy theorists, meanwhile, believe that NASA is keeping Planet 9’s existence a secret, because it’s on a collision course with Earth, which will result in our annihilation.

But let’s just stick with the scientists for now, shall we?

Research from Juliette Becker and her team indicates the answer to Planet 9’s existence lies in the life of TNOs.

Smaller than former planet Pluto, TNOs are rocky objects which orbit the sun at a greater distance than Neptune, the gas giant at the edge of the solar system. Some astronomers say that for these TNOs to occupy their current orbits, they must have been in the solar system for more than a billion years.

Others think, however, that in that vast amount of time some of these TNOs should have either crashed into another planet, been hurled into the sun or been flung out into deep space by the gravitational force of other planets.

Using a large set of computer simulations, Becker uncovered two new pieces of information about TNOs.

First, researchers constructed a simulation of Planet 9 that would most likely cause our solar system to look the way it does now, by preventing the TNOs’ destruction or banishment to interstellar space.

Second, the simulation predicted that there’s a process called ‘resonance hopping’ by which a TNO bounces between stable orbits. Resonance hopping can prevent TNOs from being forced out of the solar system.

In each simulation, the team tested different scenarios for Planet 9 to study whether that version of the planet, complete with its gravitational forces, resulted in the same solar system that we have today.

“From that set of simulations, we found out that there are preferred versions of Planet Nine that make the TNO stay stable for longer, so it basically increases the probability that our solar system exists the way it does,” Becker said.

“Through these computer simulations, we were able to determine which realization of Planet Nine creates our solar system — the whole caveat here being, if Planet Nine is real,” she added.

 

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