Solar System B

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Adi1008
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Re: Solar System B

Post by Adi1008 » October 12th, 2014, 6:33 pm

Ant-on-knee wrote:
Adi1008 wrote:
[b]1.[/b] Could be a remnant of an older Iapetus in which it spun a lot faster, height suggests a max. rotation time of 17 hours. If Iapetus cooled fast enough to preserve the ridge but remained plastic long enough for the tides raised by Saturn to have slowed the rotation to its current tidally locked 79 days, Iapetus must have been heated by the radioactive decay of aluminium-26. This isotope to be abundant in early solar system 
[b]2.[/b]The ridge could be icy diapir If it had formed away from the position of the equator at the time, this hypothesis requires that the rotational axis would have been driven to its current position by the ridge. 
[b]3.[/b] Iapetus could have had a ring system during its formation due to its large Hill sphere, and that the equatorial ridge was then produced by collisional accretion of this ring. However, the ridge appears too solid to be the result of a collapsed ring. Also, recent images show tectonic faults running through the ridge, probably isn’t true. The bulge is in isostatic equilibrium typical for terrestrial mountains. It means that under the bulge there is material of low density (roots) 
[b]4.[/b] Iapetus could have had a moon that went inside the Roche limit and was torn apart by the tidal forces. The debris formed the ridge as it came crashing down. The initial impacts made a small indentations that went around the planet, but it was soon filled up.
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Explain the difference between a resonant and classical TNO. Give details on the orbits (eccentricities, semi-major axis, etc.) and examples.
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Re: Solar System B

Post by platinumfalcon » January 2nd, 2015, 5:50 am

GoofyFoofer wrote: What is the moon Iapetus mainly composed of?
It is actually known that only 20% of Iapetus is rock; the rest, as said above, is made of ice. Just a little fact :)

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Re: Solar System B

Post by goldfalcon » January 2nd, 2015, 2:56 pm

nice :ugeek:
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Re: Solar System B

Post by platinumfalcon » January 2nd, 2015, 2:58 pm

Oops, this thread is kind of dead. Let's revive!
Cassini-Huygens discovered these kinds of landforms at the poles of Titan, largest moon of Saturn.

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Re: Solar System B

Post by goldfalcon » January 2nd, 2015, 3:12 pm

It found hydrocarbon lakes at the poles of the moon
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Re: Solar System B

Post by platinumfalcon » January 2nd, 2015, 3:19 pm

@goldfalcon: Correct, your turn.
EDIT: Also, remember to hide your answers!

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Re: Solar System B

Post by goldfalcon » January 5th, 2015, 12:18 pm

Titan, the largest moon of Saturn is primarily composed of what material?
(Remember to hide your answer)
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Re: Solar System B

Post by platinumfalcon » January 5th, 2015, 12:20 pm

Ice and rock; about half of each.
Last edited by platinumfalcon on January 5th, 2015, 12:22 pm, edited 1 time in total.

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Re: Solar System B

Post by VikP » February 9th, 2015, 5:14 pm

Since there hasn't been much activity for a while..... A quick one to kindle the fire
What is this and where is it found:
Image

Bonus:
What mission studied these?

Added bonus:
What other large "landform"/(hint: "area") did this mission study?
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Re: Solar System B

Post by Panda Weasley » February 9th, 2015, 6:00 pm

Permafrost on Mars?
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