I thought the amount of lithium in the Sun was reckoned to be on the low side, and that this is probably because it has planets.
http://www.sciencedaily.com/releases/2009/11/091111130944.htm
Was a fifth gas giant ejected from the solar system?
- Thread starter Wanderlust
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I thought the amount of lithium in the Sun was reckoned to be on the low side, and that this is probably because it has planets.
http://www.sciencedaily.com/releases/2009/11/091111130944.htm
Saquist
Commodore
Not really.
Everyone believes that the titl was caused by a collision but the moons are also tilted.
http://www.technologyreview.com/blog/arxiv/24477/
However I think this is probably a natural effect of distance countering the grip of gravity.. Planets roll around any way. They say that the Moon stablizes Earth's tilt otherwise we'd be on our side too at times... (I've never understood that.)
Object Axial tilt (°) Axial tilt (radians) Sun 7.25 0.1265 Mercury 0.0352 0.000614 Venus 177.4 3.096 Earth 23.44 0.4091 Moon 6.688† 0.1167 Mars 25.19 0.4396 Ceres ~4 ~0.07 Pallas ~60 ~1 Jupiter 3.13 0.0546 Saturn 26.73 0.4665 Uranus 97.77 1.7064 Neptune 28.32 0.4943 Pluto 119.61 2.0876
Mecury is tidally locked.
Venus is upside down and rotating in the wrong direction
Earth is anchored to Luna
Mars Earth like tilt is a "fluke" as it's spin has been rolling for millions of years
Jupiter maybe anchoring for the sun
From there the tilt get more extreme the further you go so I guess having an anchor is a big deal.
What do you mean Mercury tidally locked?
It rotates three times for every two revolutions around the Sun thus failing to keep the same side to the sun.
[i get people saying that it is tidally locked all the time and that is not accurate]
It rotates three times for every two revolutions around the Sun thus failing to keep the same side to the sun.
[i get people saying that it is tidally locked all the time and that is not accurate]
It used to be thought that Mercury was tidally locked before radar measurements were made of its rotation in the 1960s. People are either reading very old textbooks or they don't keep up to date. Pesky scientific progress.
Saquist
Commodore
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The Nice model has Uranus and Neptune forming between Jupiter and Saturn so the 5th gas giant would have likely formed in that region.
Question. In interstellar space, would a gas giant freeze? Would it have a solid surface?
I applaud you.
I applaud you.
Assuming it's a gas giant, it would probably generate its own heat for many billions of years by gravitational contraction and that would probably suffice to maintain a gaseous envelope with an underlying layer of liquid hydrogen and helium and beneath that a graduation to fluid metallic hydrogen. If the temperature did fall to 2.7K (the temperature of the background radiation in our epoch), it would have a liquid hydrogen and helium surface.
Gas giants get a large amount of their heat from inside due to huge pressures and leftover formation heat. The material in the atmosphere could stay not solid for a long time!
I think that is one of the mechanisms that may keep the surface non solid.
*edit, Asbo Zaprudder answered it best!
I'm guessing it's the same principle as a gyroscope.
Don't try so hard to immediately dismiss what you don't understand.
Multiplying a random number close to Uranus' orbital velocity to 3 billion years yields 70000 light years.
https://duckduckgo.com/?q=7+km/s+*+3+billion+years+in+light+years
I have absolutely no idea how would an ejection velocity compare to the orbital velocity, so YMMV. That's how far Uranus would go in 3 billion years if you deleted the Sun.
So using Star Trek math, that puts it somewhere in Kazon territory.
Ah, humanoids in the delta quadrant suddenly explained!
If I recall correctly, escape velocity is root 2 (~1.4142) times orbital velocity, so for Uranus 1.4142 * 6.81 km/s or 9.63 km/s. Of course, the velocity would decrease as the planet climbed out of the Sun's gravity well. Voyager 1 is currently travelling at 17.06 km/s relative to the Sun.
Whoa. 70k ly. The cosmos is probably teaming with these things. Wonder how often encounters occur between these rogue worlds and other systems.
Frightening really.
