Sol's third ice giant possibly not ejected?

[Findthepin1]

So we think Sol/the Sun had a third ice giant that was ejected in the early solar system days. It would be more likely to end up with today's system than a four-gas-giant scenario. So I was reading some stuff about outer, eccentric Trans-Neptunian Objects like Sedna, and I thought about why it might end up like that. People say there must be another planet-sized object (I don't say planet because it obviously hasn't cleared its orbit) orbiting far beyond Neptune. Its mass is supposed to be between Mars' mass and Saturn's mass.

Anyway. Is it possible that this far object is the same object as the "ejected" ice giant in the Nice model?

See here.

[pincushionman]

…Anyway. Is it possible that this far object is the same object as the "ejected" ice giant in the Nice model?…

Which far object? Did you mean a link to an article that proposes a candidate?

[fredinno]

Which far object? Did you mean a link to an article that proposes a candidate?

He's referring to the proposed Oort Cloud planet explaining Sedna-like bodies' orbits.

[vger]

Is this something new, or just the original "Planet X?" Because Planet X got discussed quite extensively a few months ago.

[fredinno]

Is this something new, or just the original "Planet X?" Because Planet X got discussed quite extensively a few months ago.

You mean, as in Neptune Planet X?

Pluto?

Nibiru?

Tyche?

[vger]

Well, Nibiru is obviously the most popular name now. Suffice is to say that some think it may have been responsible for Pluto's erratic orbit. But that just as easily could've been a rogue object just passing through.

[Findthepin1]

I am saying I think it's possible that the object supposed to have caused the eccentricity of Sedna and company's orbits might be the same object that was supposed to have been ejected from the solar system in some versions of the Nice model. I am asking whether any of the simulations don't show a complete escape of the object in those versions of the Nice model, and instead an extreme extension of its orbit to way above the Kuiper belt where it eventually circularized.

Edited November 11, 2015 by Findthepin1

[Scotius]

Nah. We are finding dwarf planets at the edges of our Solar system, and rocky, Earth-sized planets around other stars. I sincerely doubt we would miss a giant planet on our own doorstep.

[Streetwind]

Why not both?

Perhaps the third ice giant existed, then modified all the orbits to the point we see them today, and in the process of doing that, got itself ejected?

This would explain why we are seeing the orbits we see, but are also unable to find the planet responsible for them.

[prophet_01]

As far as I know it's a lot easyer* (still not easy at all) to find planets near other stars than it is to find an object this far out. It would have almost no heat signature and it's rly far out which means that it doesn't receive much light to reflect. The concepts used to track exo-planets won't work either.

And since most of it's potential effects on the solar system could just as well be caused by other phenomenas, were pretty much down to russel's tea cup.

We might never know for sure. But I certainly wouldn't rule it out.

Edit: btw, do we rly need 2 threads on this? An older one is also on the front page.

Edited November 12, 2015 by prophet_01

[More Boosters]

Nah. We are finding dwarf planets at the edges of our Solar system, and rocky, Earth-sized planets around other stars. I sincerely doubt we would miss a giant planet on our own doorstep.

We find ones that are very close to their star though.

[PB666]

As far as I know it's a lot easyer* (still not easy at all) to find planets near other stars than it is to find an object this far out. It would have almost no heat signature and it's rly far out which means that it doesn't receive much light to reflect. The concepts used to track exo-planets won't work either.

And since most of it's potential effects on the solar system could just as well be caused by other phenomenas, were pretty much down to russel's tea cup.

We might never know for sure. But I certainly wouldn't rule it out.

Edit: btw, do we rly need 2 threads on this? An older one is also on the front page.

Three if you count the page on the newly discovered planetoid. Because people don't do thread searches before they post.

newsest thread. http://forum.kerbalspaceprogram.com/threads/139150-V774104-the-new-most-distant-object-in-our-solar-system

posted the previous day:http://forum.kerbalspaceprogram.com/threads/133386-Dark-Giant-may-be-lurking-beyond-pluto-s-orbit?p=2290339#post2290339. into apreviously started thread.

Edited November 13, 2015 by PB666

[Findthepin1]

Relevant thing [url]http://www.sciencealert.com/our-solar-system-used-to-have-another-gas-giant-planet-but-jupiter-likely-kicked-it-out?utm_source=Article&utm_medium=Website&utm_campaign=InArticleReadMore[/url]

Also

[quote name='the article'][COLOR=#333333][FONT=Open Sans]The mystery lost planet in question is believed to have had the mass of an ice giant, which means that it was heavier than Saturn and Jupiter, and in the same class as Neptune and Uranus. So how exactly does a lighter planet suddenly kick an ice giant clear out of the Solar System?[/FONT][/COLOR][/QUOTE]

oh my god XD

[Just Jim]

Wouldn't it be cool if New Horizon suddenly saw something huge in front of it??? Edited November 18, 2015 by Just Jim