History UsefulNotes / TheSolarSystem

29th Jul '16 12:43:47 AM harharhar
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** [[https://en.wikipedia.org/wiki/Planet_Nine Planet Nine]][[note]]Listed here for convenience as this thing is theoretically far more massive than anything else in the outer edges of the solar system[[/note]]: This hypothetical large planet far, far away from the sun[[note]]At its farthest, Neptune is 30-something AU away from the sun; Planet's Nine's nearest distance to the sun is predicted to be about ''200 AU''[[/note]] is suspected to be responsible for the positionings and orbits of the Trans-Neptunian Objects. It has yet to be visually detected.
31st May '16 11:12:11 AM dieseldragons
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* UsefulNotes/TheSun: The star of the show, literally and figuratively. About 99.9% of all the mass in the Solar system is in the sun. Our Sun is a wonderfully stable one, unusually so even for a G-type, which is beneficial for us. Other stars big and small often emit dangerous-to-life x-ray flares. She has [[BeautyMark the odd sunspot here and there too]], and thank goodness, last time our Sun didn't we experienced an ice age. Sadly, all good things must come to an end. The Sun is already 4.6 billion years old, and when it uses up too much of its Hydrogen reserves, it'll get hotter and hotter, until becoming a humongous Red Giant that'll no doubt swallow up the inner planets along with Earth. [[/index]]

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* UsefulNotes/TheSun: The star of the show, literally and figuratively. About 99.9% of all the mass in the Solar system is in the sun. Our Sun is a wonderfully stable one, unusually so even for a G-type, which is beneficial for us. Other stars big and small often emit dangerous-to-life x-ray flares. She has [[BeautyMark the odd sunspot here and there too]], and thank goodness, last time our Sun didn't didn't, we experienced an ice age. Rather than red dwarfs, that shine out mostly infrared light, she emits a lot of light on the visible spectrum, [[ThePowerOfTheSun which is just great for photosynthesising plants]]. She does emit ultraviolet radiation too, [[EmbarrassinglyPainfulSunburn so put on that sunblock before you step outside]]. Sadly, all good things must come to an end. The Sun is already 4.6 billion years old, and when it uses up too much of its Hydrogen reserves, it'll get hotter and hotter, until becoming a humongous Red Giant that'll no doubt swallow up the inner planets along with Earth. [[/index]]
31st May '16 11:04:11 AM dieseldragons
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* UsefulNotes/TheSun: The star of the show, literally and figuratively. About 99.9% of all the mass in the Solar system is in the sun. Our Sun is a wonderfully stable one, unusually so even for a G-type, which is beneficial for us. Other stars big and small often emit dangerous-to-life x-ray flares. Sadly, all good things must come to an end. The Sun is already 4.6 billion years old, and when it uses up too much of its Hydrogen reserves, it'll get hotter and hotter, until becoming a humongous Red Giant that'll no doubt swallow up the inner planets along with Earth. [[/index]]

to:

* UsefulNotes/TheSun: The star of the show, literally and figuratively. About 99.9% of all the mass in the Solar system is in the sun. Our Sun is a wonderfully stable one, unusually so even for a G-type, which is beneficial for us. Other stars big and small often emit dangerous-to-life x-ray flares. She has [[BeautyMark the odd sunspot here and there too]], and thank goodness, last time our Sun didn't we experienced an ice age. Sadly, all good things must come to an end. The Sun is already 4.6 billion years old, and when it uses up too much of its Hydrogen reserves, it'll get hotter and hotter, until becoming a humongous Red Giant that'll no doubt swallow up the inner planets along with Earth. [[/index]]
26th May '16 4:24:49 PM Doug86
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Despite years and years of ScienceFiction stories about planets around other suns, we actually lacked any real scientific proof of them until the early 1990's when exoplanets were first detected by their wobble on their parent star. Until then, it was quite possible that our solar system was simply a fluke. For example, one theory on the formation of our solar system, "Tidal Theory" - 1917, was that a passing star came close to our sun, drawing a filament of solar matter out of it which coalesced into the planets. Website/{{Wikipedia}} has a page on those theories [[https://en.wikipedia.org/wiki/History_of_Solar_System_formation_and_evolution_hypotheses here]] if you are interested.

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Despite years and years of ScienceFiction stories about planets around other suns, we actually lacked any real scientific proof of them until the early 1990's when exoplanets were first detected by their wobble on their parent star. Until then, it was quite possible that our solar system was simply a fluke. For example, one theory on the formation of our solar system, "Tidal Theory" - 1917, was that a passing star came close to our sun, drawing a filament of solar matter out of it which coalesced into the planets. Website/{{Wikipedia}} Wiki/{{Wikipedia}} has a page on those theories [[https://en.wikipedia.org/wiki/History_of_Solar_System_formation_and_evolution_hypotheses here]] if you are interested.
21st May '16 1:59:38 PM Tarlonniel
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'''Mars''' is red, And '''Jupiter''''s big. '''Saturn''' shows off it's rings. '''Uranus''' is built on a funny tilt, And '''Neptune''' is its twin.\\

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'''Mars''' is red, And '''Jupiter''''s big. '''Saturn''' shows off it's its rings. '''Uranus''' is built on a funny tilt, And '''Neptune''' is its twin.\\
21st May '16 1:54:51 PM dieseldragons
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* UsefulNotes/{{Jupiter}}: The largest of them all, and thus fittingly named after the Roman God of Gods. Of course, [[OlderThanTheyThink the Romans named it that long before they had any idea just how big it was]]. Jupiter is ''vast'', often referred to as a "failed brown dwarf" and while not as dense as Earth, it has a magnetic field some 20,000 times stronger than our world does. Jupiter has been described as a cosmic vacuum [[BigBrotherInstinct protecting us from comets and other asteroids]] that would otherwise [[TheEndOfTheWorldAsWeKnowIt obliterate all life on Earth]].

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* UsefulNotes/{{Jupiter}}: The largest of them all, and thus fittingly named after the Roman God of Gods. Of course, [[OlderThanTheyThink the Romans named it that long before they had any idea just how big it was]]. Jupiter is ''vast'', often referred to as a "failed brown dwarf" and while not as dense as Earth, it has a magnetic field some 20,000 times stronger than our world does. Jupiter is... ''odd'', and by extension makes our solar system unusual. Gas giants have the tendency to migrate inwards towards their stars, becoming "hot jupiters". This happened in our system, and it would have come in like a wrecking ball... until the formation of Saturn. Saturn pulled Jupiter outwards, allowing the rocky terrestrial worlds to form. Jupiter has been described as a cosmic vacuum [[BigBrotherInstinct protecting us from comets and other asteroids]] that would otherwise [[TheEndOfTheWorldAsWeKnowIt obliterate all life on Earth]].
16th May '16 2:15:11 AM Morgenthaler
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** UsefulNotes/TheMoonsOfUranus (The Bard [[AC:InSpace]]): Fittingly for an English-discovered planet, Uranus' moons are all named after characters from Creator/WilliamShakespeare. Two of the original five received names from Creator/AlexanderPope's ''TheRapeOfTheLock''.

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** UsefulNotes/TheMoonsOfUranus (The Bard [[AC:InSpace]]): Fittingly for an English-discovered planet, Uranus' moons are all named after characters from Creator/WilliamShakespeare. Two of the original five received names from Creator/AlexanderPope's ''TheRapeOfTheLock''.''Literature/TheRapeOfTheLock''.
11th May '16 2:58:51 PM RainbowPhoenix
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* UsefulNotes/{{Venus}}: sometimes referred to as Earth's sister planet due to their similar sizes. It has an extremely dense atmosphere (surface pressure is 90 bars, compared to 1 on Earth) and can reach a surface temperature of 470 °C/870 °F (although at the top of Maxwell Montes, almost 7 miles above the average surface level, it's "only" 380 °C/716 °F and 60 bars). The culprit for all this? The greenhouse effect--90 atmospheres of carbon dioxide with some helping of other greenhouse gases will be quite hot. [[note]]"An Estimate of the Surface Temperature of Venus Independent of Passive Microwave Radiometry" by one [[Creator/CarlSagan C. Sagan]] gives it at ~700K in 1967.[[/note]] Volcanoes on Earth have belched out the same amount, [[SealedEvilInACan but it ended up trapped in carbonate rock]]. Venus also started with the same amount of water as the earth had, but it was vaporized (300 atmospheres worth) and created a [[UpToEleven super greenhouse effect]] with temperatures in the ''thousands'' of degrees. [[note]]This plus the slow rotation probably wrecked any chance at plate tectonics; instead of plates constantly sliding against each other, [[LethalLavaLand there seems to be intermittent vulcanism punctuated by the entire surface melting every 500 million years or so]].[[/note]] Eventually the water molecules dissociated into hydrogen and oxygen and escaped into space, leaving Venus high and dry. Interestingly, the zone between 50 and 65 kilometers above the surface has pressures and temperatures right around Earth normal. Add to that the fact that an 80/20 nitrogen/oxygen mix would act like a lifting gas and [[Film/TheEmpireStrikesBack Cloud City]] would be right at home. It oddly rotates in the ''opposite direction'' to most other planets. Due to Venus being mythologically associated with femininity, by convention all geographic features there are named after women or female entities, except for Maxwell Montes and Alpha and Beta Regio. [[note]]These features were first detected by ground-based radar in the mid-1960s; Alpha and Beta Regio were the first two terrain features to be isolated, and Maxwell Montes was named after James Clerk Maxwell, the formulator of the theory and equations of electromagnetism that ultimately led to the invention of radar.[[/note]] There is some argument over whether the proper adjective is 'Venusian', 'Venerean', or 'Cytherean'.

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* UsefulNotes/{{Venus}}: sometimes referred to as Earth's sister planet due to their similar sizes. It has an extremely dense atmosphere (surface pressure is 90 bars, compared to 1 on Earth) and can reach a surface temperature of 470 °C/870 °F (although at the top of Maxwell Montes, almost 7 miles above the average surface level, it's "only" 380 °C/716 °F and 60 bars). The culprit for all this? The greenhouse effect--90 atmospheres of carbon dioxide with some helping of other greenhouse gases will be quite hot. [[note]]"An Estimate of the Surface Temperature of Venus Independent of Passive Microwave Radiometry" by one [[Creator/CarlSagan C. Sagan]] gives it at ~700K in 1967.[[/note]] Volcanoes on Earth have belched out the same amount, [[SealedEvilInACan but it ended up trapped in carbonate rock]]. Venus also started with the same amount of water as the earth had, but it was vaporized (300 atmospheres worth) and created a [[UpToEleven super greenhouse effect]] with temperatures in the ''thousands'' of degrees. [[note]]This plus the slow rotation probably wrecked any chance at plate tectonics; instead of plates constantly sliding against each other, [[LethalLavaLand there seems to be intermittent vulcanism punctuated by extreme periods of volcanic activity replacing much of the entire surface melting every 500 million billion years or so]].[[/note]] Eventually the water molecules dissociated into hydrogen and oxygen and escaped into space, leaving Venus high and dry. Interestingly, the zone between 50 and 65 kilometers above the surface has pressures and temperatures right around Earth normal. Add to that the fact that an 80/20 nitrogen/oxygen mix would act like a lifting gas and [[Film/TheEmpireStrikesBack Cloud City]] would be right at home. It oddly rotates in the ''opposite direction'' to most other planets. Due to Venus being mythologically associated with femininity, by convention all geographic features there are named after women or female entities, except for Maxwell Montes and Alpha and Beta Regio. [[note]]These features were first detected by ground-based radar in the mid-1960s; Alpha and Beta Regio were the first two terrain features to be isolated, and Maxwell Montes was named after James Clerk Maxwell, the formulator of the theory and equations of electromagnetism that ultimately led to the invention of radar.[[/note]] There is some argument over whether the proper adjective is 'Venusian', 'Venerean', or 'Cytherean'.
9th May '16 12:48:56 PM dieseldragons
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* UsefulNotes/{{Venus}}: sometimes referred to as Earth's sister planet due to their similar sizes. It has an extremely dense atmosphere (surface pressure is 90 bars, compared to 1 on Earth) and can reach a surface temperature of 470 °C/870 °F (although at the top of Maxwell Montes, almost 7 miles above the average surface level, it's "only" 380 °C/716 °F and 60 bars). The culprit for all this? The greenhouse effect--90 atmospheres of carbon dioxide with some helping of other greenhouse gases will be quite hot. [[note]]"An Estimate of the Surface Temperature of Venus Independent of Passive Microwave Radiometry" by one [[Creator/CarlSagan C. Sagan]] gives it at ~700K in 1967.[[/note]] Volcanoes on Earth have belched out the same amount, [[SealedEvilInACan but it ended up trapped in carbonate rock]]. Venus also started with the same amount of water as the earth had, but it was vaporized (300 atmospheres worth) and created a [[UpToEleven super greenhouse effect]] with temperatures in the ''thousands'' of degrees. [[note]]This plus the slow rotation probably wrecked any chance at plate tectonics; instead of plates constantly sliding against each other, [[LethalLavaLand there seems to be intermittent vulcanism punctuated by the entire surface melting every 500 million years or so]].[[/note]] Eventually the water molecules dissociated into hydrogen and oxygen and escaped into space, leaving Venus high and dry. Interestingly, the zone between 50 and 65 kilometers above the surface has pressures and temperatures right around Earth normal. Add to that the fact that an 80/20 nitrogen/oxygen mix would act like a lifting gas and [[Film/TheEmpireStrikesBack Cloud City]] would be right at home. Due to Venus being mythologically associated with femininity, by convention all geographic features there are named after women or female entities, except for Maxwell Montes and Alpha and Beta Regio. [[note]]These features were first detected by ground-based radar in the mid-1960s; Alpha and Beta Regio were the first two terrain features to be isolated, and Maxwell Montes was named after James Clerk Maxwell, the formulator of the theory and equations of electromagnetism that ultimately led to the invention of radar.[[/note]] There is some argument over whether the proper adjective is 'Venusian', 'Venerean', or 'Cytherean'.

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* UsefulNotes/{{Venus}}: sometimes referred to as Earth's sister planet due to their similar sizes. It has an extremely dense atmosphere (surface pressure is 90 bars, compared to 1 on Earth) and can reach a surface temperature of 470 °C/870 °F (although at the top of Maxwell Montes, almost 7 miles above the average surface level, it's "only" 380 °C/716 °F and 60 bars). The culprit for all this? The greenhouse effect--90 atmospheres of carbon dioxide with some helping of other greenhouse gases will be quite hot. [[note]]"An Estimate of the Surface Temperature of Venus Independent of Passive Microwave Radiometry" by one [[Creator/CarlSagan C. Sagan]] gives it at ~700K in 1967.[[/note]] Volcanoes on Earth have belched out the same amount, [[SealedEvilInACan but it ended up trapped in carbonate rock]]. Venus also started with the same amount of water as the earth had, but it was vaporized (300 atmospheres worth) and created a [[UpToEleven super greenhouse effect]] with temperatures in the ''thousands'' of degrees. [[note]]This plus the slow rotation probably wrecked any chance at plate tectonics; instead of plates constantly sliding against each other, [[LethalLavaLand there seems to be intermittent vulcanism punctuated by the entire surface melting every 500 million years or so]].[[/note]] Eventually the water molecules dissociated into hydrogen and oxygen and escaped into space, leaving Venus high and dry. Interestingly, the zone between 50 and 65 kilometers above the surface has pressures and temperatures right around Earth normal. Add to that the fact that an 80/20 nitrogen/oxygen mix would act like a lifting gas and [[Film/TheEmpireStrikesBack Cloud City]] would be right at home. It oddly rotates in the ''opposite direction'' to most other planets. Due to Venus being mythologically associated with femininity, by convention all geographic features there are named after women or female entities, except for Maxwell Montes and Alpha and Beta Regio. [[note]]These features were first detected by ground-based radar in the mid-1960s; Alpha and Beta Regio were the first two terrain features to be isolated, and Maxwell Montes was named after James Clerk Maxwell, the formulator of the theory and equations of electromagnetism that ultimately led to the invention of radar.[[/note]] There is some argument over whether the proper adjective is 'Venusian', 'Venerean', or 'Cytherean'.
9th May '16 12:45:34 PM dieseldragons
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* UsefulNotes/{{Uranus}}: It had been detected by astronomers as early as 1690[[note]]John Flamsteed thought it was a star and named it "34 Tauri"; that designation was therefore available for [[Creator/JossWhedon a certain talespinner]] to apply to [[{{Series/Firefly}} the star system at the heart of his one of his 'Verses]].[[/note]], but Sir William Herschell actually identified it as a planet in 1789. It is named after the Greek god of the sky.[[note]]Yes, really, [[UranusIsShowing you adolescents]].[[/note]] It's 4 times the diameter of the Earth, which is still less than half the diameter of Jupiter. Seen as minty green in color observed from Earth by early telescopes, close-up observation showed it's more pale blue. It's denser than Jupiter and Saturn with a higher proportion of methane, ammonia and water. Uranus is even colder than Neptune. Voyager 2 passed by it in 1986 and observed few distinct clouds, [[ScienceMarchesOn but later observations from Earth have revealed more]]. It has a set of coal-black rings (discovered in 1977) and is tilted 98 degrees on its axis--each pole spends 42 years in light and 42 in darkness. Scientists have reason to believe it's own its side-ways tilt due to a massive impact. Also known for being the planet which the ''[[Franchise/StarTrek Enterprise]]'' circles while [[UranusIsShowing wiping out Klingons]].

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* UsefulNotes/{{Uranus}}: It had been detected by astronomers as early as 1690[[note]]John Flamsteed thought it was a star and named it "34 Tauri"; that designation was therefore available for [[Creator/JossWhedon a certain talespinner]] to apply to [[{{Series/Firefly}} the star system at the heart of his one of his 'Verses]].[[/note]], but Sir William Herschell actually identified it as a planet in 1789. It is named after the Greek god of the sky.[[note]]Yes, really, [[UranusIsShowing you adolescents]].[[/note]] It's 4 times the diameter of the Earth, which is still less than half the diameter of Jupiter. Seen as minty green in color observed from Earth by early telescopes, close-up observation showed it's more pale blue. It's denser than Jupiter and Saturn with a higher proportion of methane, ammonia and water. Uranus is even colder than Neptune. Voyager 2 passed by it in 1986 and observed few distinct clouds, [[ScienceMarchesOn but later observations from Earth have revealed more]]. It has a set of coal-black rings (discovered in 1977) and is tilted 98 degrees on its axis--each pole spends 42 years in light and 42 in darkness. Scientists have reason to believe it's own on its unique side-ways tilt due to a massive impact.impact that depleted it's internal core temperature. Also known for being the planet which the ''[[Franchise/StarTrek Enterprise]]'' circles while [[UranusIsShowing wiping out Klingons]].
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