History UsefulNotes / TheSolarSystem

13th Feb '16 11:36:02 AM pittsburghmuggle
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* JustForFun/{{Earth}} (or in Latin: [[PlanetTerra Terra]]): Mostly considered an InsignificantLittleBluePlanet that despite its status holds [[EarthIsTheCenterOfTheUniverse extreme significance]] for [[PunyEarthlings some carbon-based lifeforms]].
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* JustForFun/{{Earth}} UsefulNotes/{{Earth}} (or in Latin: [[PlanetTerra Terra]]): Mostly considered an InsignificantLittleBluePlanet that despite its status holds [[EarthIsTheCenterOfTheUniverse extreme significance]] for [[PunyEarthlings some carbon-based lifeforms]].
1st Feb '16 9:52:01 PM RainbowPhoenix
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* Last but not least, in January 2016 a group of astronomers have suggested that the eccentric orbits of several large Kuiper Belt Objects could be explained by the presence of a ninth planet, that would be a bit smaller in mass than Neptune or Uranus, two to four times larger than Earth, and that would orbit the Sun in a highly eccentric and inclined orbit that would take many thousands of years to complete never approaching at less than around seven times the Sun-Neptune distance. Please note, however, that despite the claims of "a new planet discovered" there's at best just indirect proof of its existence and it's an entirely hypothetical object until it's finally imaged[[note]]Not something that will be easy, mind you, with ''millions'' of stars and galaxies of similar brightness to that planet if it existed at all[[/note]].
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* Last but not least, in January 2016 a group of astronomers have suggested that the eccentric orbits of several large Kuiper Belt Objects (see the Detached Object category of small solar system bodies listed further down) could be explained by the presence of a ninth planet, that would be a bit smaller in mass than Neptune or Uranus, two to four times larger than Earth, and that would orbit the Sun in a highly eccentric and inclined orbit that would take many thousands of years to complete never approaching at less than around seven times the Sun-Neptune distance. Please note, however, that despite the claims of "a new planet discovered" there's at best just indirect proof of its existence and it's an entirely hypothetical object until it's finally imaged[[note]]Not something that will be easy, mind you, with ''millions'' of stars and galaxies of similar brightness to that planet if it existed at all[[/note]].
1st Feb '16 6:42:44 AM ScorpiusOB1
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* Last but not least, in January 2016 a group of astronomers have suggested that the eccentric orbits of several large Kuiper objects could be explained by the presence of a ninth planet, that would be a bit smaller in mass than Neptune or Uranus, two to four times larger than Earth, and that would orbit the Sun in a highly eccentric and inclined orbit that would take many thousands of years to complete never approaching at less than around seven times the Sun-Neptune distance. Please note, however, that despite the claims of "a new planet discovered" there's at best just indirect proof of its existence and it's an entirely hypothetical object until it's finally imaged[[note]]Not something that will be easy, mind you[[/note]].
to:
* Last but not least, in January 2016 a group of astronomers have suggested that the eccentric orbits of several large Kuiper objects Belt Objects could be explained by the presence of a ninth planet, that would be a bit smaller in mass than Neptune or Uranus, two to four times larger than Earth, and that would orbit the Sun in a highly eccentric and inclined orbit that would take many thousands of years to complete never approaching at less than around seven times the Sun-Neptune distance. Please note, however, that despite the claims of "a new planet discovered" there's at best just indirect proof of its existence and it's an entirely hypothetical object until it's finally imaged[[note]]Not something that will be easy, mind you[[/note]].you, with ''millions'' of stars and galaxies of similar brightness to that planet if it existed at all[[/note]].
1st Feb '16 6:41:19 AM ScorpiusOB1
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Added DiffLines:
* Last but not least, in January 2016 a group of astronomers have suggested that the eccentric orbits of several large Kuiper objects could be explained by the presence of a ninth planet, that would be a bit smaller in mass than Neptune or Uranus, two to four times larger than Earth, and that would orbit the Sun in a highly eccentric and inclined orbit that would take many thousands of years to complete never approaching at less than around seven times the Sun-Neptune distance. Please note, however, that despite the claims of "a new planet discovered" there's at best just indirect proof of its existence and it's an entirely hypothetical object until it's finally imaged[[note]]Not something that will be easy, mind you[[/note]].
30th Jan '16 2:00:58 PM RainbowPhoenix
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To qualify as a dwarf planet, or "plutino", the object must be big enough that its own gravity has pulled it into a more-or-less round shape. (It also can't be orbiting another planet, since then it would be a moon.) Even beyond the Pluto issue, the concept of dwarf planets is controversial among astronomers because of both the relatively arbitrary distinction between a dwarf planet and a planet[[note]]By some interpretations, ''Neptune'', the third largest planet, would not fit the new definition of a planet, since it has failed to sweep objects such as Pluto and Eris out of its orbit.[[/note]], and because the terminology is inconsistent (i.e. a dwarf star is ''always'' a ''type'' of star rather than a separate category, so how would a dwarf planet not be type of planet?). To date, only 5 dwarf planets are known:
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To qualify as a dwarf planet, or "plutino", the object must be big enough that its own gravity has pulled it into a more-or-less round shape. (It also can't be orbiting another planet, since then it would be a moon.) Even beyond the Pluto issue, the concept of dwarf planets is controversial among astronomers because of both the relatively arbitrary distinction between a dwarf planet and a planet[[note]]By some interpretations, ''Neptune'', the third largest planet, would not fit the new definition of a planet, since it has failed to sweep objects such as Pluto and Eris out of its orbit. However, this is a misunderstanding of the term; "Clearing the Neighborhood" also accounts for smaller bodies being locked into an orbital resonance where the are still controlled by the planet without directly orbiting it, which is exactly what Neptune did to everything that it did not expel or capture, Pluto included.[[/note]], and because the terminology is inconsistent (i.e. a dwarf star is ''always'' a ''type'' of star rather than a separate category, so how would a dwarf planet not be type of planet?). To date, only 5 dwarf planets are known:

The differences between the last four can be contentious. The Kuiper Belt mostly consists of objects locked into orbital resonance with Neptune. Pluto, along with many other objects known as "plutinos", is locked into a 3:2 resonance. Another class of objects, called "twotinos", are locked into a 2:1 resonance, and other, more arcane resonances exist. The scattered disc consists of objects pushed further out into space by Neptune's outward migration (relatively early in the life of the Solar System); Eris and several other dwarf planets are located here. The Oort cloud consists of objects upon which Neptune's gravity has little significant effect. The Detached Objects are trans-Neptunian bodies that are too close to the sun to be part of the Oort Cloud, yet too far away for Neptune to be responsible for their eccentric orbits. Since the dividing line for all three is the historical gravitational effect of another astronomical object, one really can't say "at XX AU, the Kuiper belt ends and the scattered disc begins."
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The differences between the last four can be contentious. The Kuiper Belt mostly consists of objects locked into orbital resonance with Neptune. Pluto, along with many other objects known as "plutinos", is locked into a 3:2 resonance. Another class of objects, called "twotinos", are locked into a 2:1 resonance, and other, more arcane resonances exist. The scattered disc consists of objects pushed further out into space by Neptune's outward migration (relatively early in the life of the Solar System); Eris and several other dwarf planets are located here. The Oort cloud consists of objects upon which Neptune's gravity has little significant effect. The Detached Objects are trans-Neptunian bodies that are too close to the sun to be part of the Oort Cloud, yet too far away for Neptune to be responsible for their eccentric orbits. Since the dividing line for all three four is the historical gravitational effect of another astronomical object, one really can't say "at XX AU, the Kuiper belt ends and the scattered disc begins."
30th Jan '16 1:25:03 PM RainbowPhoenix
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* [[https://en.wikipedia.org/wiki/Detached_object Detached Objects]]

The differences between the last three can be contentious. The Kuiper Belt mostly consists of objects locked into orbital resonance with Neptune. Pluto, along with many other objects known as "plutinos", is locked into a 3:2 resonance. Another class of objects, called "twotinos", are locked into a 2:1 resonance, and other, more arcane resonances exist. The scattered disc consists of objects pushed further out into space by Neptune's outward migration (relatively early in the life of the Solar System); Eris and several other dwarf planets are located here. The Oort cloud consists of objects upon which Neptune's gravity has little significant effect. Since the dividing line for all three is the historical gravitational effect of another astronomical object, one really can't say "at XX AU, the Kuiper belt ends and the scattered disc begins."
to:
The differences between the last three four can be contentious. The Kuiper Belt mostly consists of objects locked into orbital resonance with Neptune. Pluto, along with many other objects known as "plutinos", is locked into a 3:2 resonance. Another class of objects, called "twotinos", are locked into a 2:1 resonance, and other, more arcane resonances exist. The scattered disc consists of objects pushed further out into space by Neptune's outward migration (relatively early in the life of the Solar System); Eris and several other dwarf planets are located here. The Oort cloud consists of objects upon which Neptune's gravity has little significant effect. The Detached Objects are trans-Neptunian bodies that are too close to the sun to be part of the Oort Cloud, yet too far away for Neptune to be responsible for their eccentric orbits. Since the dividing line for all three is the historical gravitational effect of another astronomical object, one really can't say "at XX AU, the Kuiper belt ends and the scattered disc begins."
26th Jan '16 7:00:00 PM TheWhistleTropes
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The things you can find in our star system. Generally speaking, it consists of a central star, four Earth-type planets, four gas giants, and a large amount of smaller objects, including dwarf planets, moons, asteroids, comets and space junk, mostly clustered in rings around the Sun or other planets.
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The things you can find in our star system. Generally speaking, it consists of a central star, four Earth-type planets, four ([[ScienceMarchesOn or five]]) gas giants, and a large amount of smaller objects, including dwarf planets, moons, asteroids, comets and space junk, mostly clustered in rings around the Sun or other planets.
21st Jan '16 10:26:17 AM MarqFJA
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[[caption-width-right:350:[[MyFriendsAndZoidberg Ignore Pluto. It's not a planet anymore.]] Also, [[YouCannotGraspTheTrueForm Definitely not to Scale]]]]
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[[caption-width-right:350:[[MyFriendsAndZoidberg Ignore Pluto. ]] [[PlutoIsExpendable It's not a planet anymore.]] Also, [[YouCannotGraspTheTrueForm Definitely definitely not to Scale]]]]
24th Dec '15 9:24:15 PM pittsburghmuggle
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-->--''WesternAnimation/SchoolhouseRock'', "Interplanet Janet"[[note]]Released before the [=IAU=] redefinition of a planet and while the voyager probe still hadn't visited the outer planets.[[/note]]
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-->--''WesternAnimation/SchoolhouseRock'', "Interplanet Janet"[[note]]Released "[[https://www.youtube.com/watch?v=MGgajx1pGPU Interplanet Janet]]"[[note]]Released before the [=IAU=] redefinition of a planet and while the voyager probe Voyager probes still hadn't yet visited the outer planets.planets, explaining why their descriptions are light on info.[[/note]]
24th Dec '15 9:23:03 PM pittsburghmuggle
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-->--''WesternAnimation/SchoolhouseRock'', "Interplanet Janet" (Released before the redefinition of Pluto)
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-->--''WesternAnimation/SchoolhouseRock'', "Interplanet Janet" (Released Janet"[[note]]Released before the [=IAU=] redefinition of Pluto) a planet and while the voyager probe still hadn't visited the outer planets.[[/note]]
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