Planet Nine, Planet x, or Nibiru?

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Waterfall said:
Is it an exoplanet if it's out of the solar system?
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Not if it orbits the sun. Orbiting the sun makes it by definition in the solar system. Assuming we confirm the existence of Nine, we simply have a bigger solar system than we thought.
 
Mendalla said:
Not if it orbits the sun. Orbiting the sun makes it by definition in the solar system. Assuming we confirm the existence of Nine, we simply have a bigger solar system than we thought.
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Okay, I'm not a scientist here, but can a planet exist without the sun having a very high affect on it if it is "not in the zone"?
 
Only ifitis a peculiar outlander zone that doesn't follow physical rules .... like metaphysical apparitions that appear as not physically apparent in the abstract ... or imagination ...

Like passions bewitching the real wisdom which can metaphysically impinged upon by spirits of virtual emotion! Thus I can tell you your out of ID ...
 
Waterfall said:
Okay, I'm not a scientist here, but can a planet exist without the sun having a very high affect on it if it is "not in the zone"?
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It will be outside the solar wind, so won't be affected much, if at all, by that but is still bound to the sun by gravity so is affected by the sun that way. An object's (e.g. the sun's) gravity technically never drops to 0, just gets weaker and weaker with distance (inverse square law) until it is so weak that it is negligible. Nine is still close enough to the sun that the sun's gravitational effect has not hit "negligible" and Nine therefore orbits the sun.

Speaking highly speculatively, at that distance I suspect it may be possible that another star passing close to us may possibly be able to knock Nine loose and either add it to its solar system or send it roaming as one of those rogue planets @revsdd and I were discussing. In fact, given it's distance and eccentric orbit, I suppose that's a possible hypothesis as to how we got it in the first place (nicked it from another system). I'm not qualified to do the math on that, though (it would require some heavy duty calculus and likely computer simulation software), and until we find Nine and confirm it's orbit, I doubt even an astronomer would be able to say for sure if this is a real possibility.
 
Waterfall said:
The further out we go, I'm not even sure Einstein would be qualified.
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Actually, he's the one who worked out the math we would have to use. ;) Well, some could probably be done with Newtonian mechanics and gravity, but I suspect you would end up using General Relativity in the end for most of the grunt work.
 
Mendalla said:
It will be outside the solar wind, so won't be affected much, if at all, by that but is still bound to the sun by gravity so is affected by the sun that way. An object's (e.g. the sun's) gravity technically never drops to 0, just gets weaker and weaker with distance (inverse square law) until it is so weak that it is negligible. Nine is still close enough to the sun that the sun's gravitational effect has not hit "negligible" and Nine therefore orbits the sun.

Speaking highly speculatively, at that distance I suspect it may be possible that another star passing close to us may possibly be able to knock Nine loose and either add it to its solar system or send it roaming as one of those rogue planets @revsdd and I were discussing. In fact, given it's distance and eccentric orbit, I suppose that's a possible hypothesis as to how we got it in the first place (nicked it from another system). I'm not qualified to do the math on that, though (it would require some heavy duty calculus and likely computer simulation software), and until we find Nine and confirm it's orbit, I doubt even an astronomer would be able to say for sure if this is a real possibility.
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The eccentric orbit does make Planet 9 (assuming its existence) very unusual. I'm assuming it's a gas giant, and since it's been described as smaller than Neptune I'm guessing it's larger than Uranus. You'd think that if it had formed at the same time as Neptune and Uranus, etc., it wouldn't have such an unusual orbit. The orbit, to me, suggests that it might have been "captured" by the sun as opposed to being an original part of the solar system, since the other planets have "normal" orbits. But I'm just an amateur with an interest in astronomy, and not an astronomer, so who knows.
 
revsdd said:
But I'm just an amateur with an interest in astronomy, and not an astronomer, so who knows.
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Ditto. And with all the big astronomy news over the past year or two (New Horizons, Dawn, Planet Nine, Curiosity's ongoing work on Mars), my interest is probably higher than it's been at any time since I was in my teens and twenties following the Voyager 1 & 2 missions.
 
Well there are contradictions in space to the way we would do math, such as why the suns atmosphere is hotter than it's core, why Uranus rotates on it's side, and maybe someday New Horizons will answer why the Kuiper cliff exists. I'm sure we'll discover new laws to add to what we know.
 
Waterfall said:
Well there are contradictions in space to the way we would do math, such as why the suns atmosphere is hotter than it's core, why Uranus rotates on it's side, and maybe someday New Horizons will answer why the Kuiper cliff exists. I'm sure we'll discover new laws to add to what we know.
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I recommend watching Crash Course Astronomy. It's a nice, up-to-date Astronomy 101 for non-astronomers by an astronomer (Dr. Phil Plait, aka The Bad Astronomer) and some of the questions you raise are actually addressed as there are tested hypotheses to explain them (e.g. the sun's atmosphere temperature). Uranus' tilt remains a mystery, though there are some good theories on it. Alas, he finished the last episode a week or so ago so Planet Nine didn't make it in.
 
Mendalla said:
I recommend watching Crash Course Astronomy. It's a nice, up-to-date Astronomy 101 for non-astronomers by an astronomer (Dr. Phil Plait, aka The Bad Astronomer) and some of the questions you raise are actually addressed as there are tested hypotheses to explain them (e.g. the sun's atmosphere temperature). Uranus' tilt remains a mystery, though there are some good theories on it. Alas, he finished the last episode a week or so ago so Planet Nine didn't make it in.
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Does astronomy require reverence for space? Even if the space is empty?
 
:cool:Oh good goths that could create content to burps and pits ... and certainly chmerii stuff left in a spot where a god-hero believed there to be nothing ... thus something became 've it ... quickly over 9 periods of time ...
 
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