Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: thedoc on 13/02/2013 14:15:11

Title: How did the solar system form?
Post by: thedoc on 13/02/2013 14:15:11

How did the solar system, from massive gas planets like Jupiter down to tiny asteroids, form? New computer modelling may have the answers...
Read a transcript of the interview by clicking here (http://www.thenakedscientists.com/HTML/content/interviews/interview/1000118/)

or [chapter podcast=1000083 track=13.02.07/Naked_Scientists_Show_13.02.07_1000410.mp3](https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fwww.thenakedscientists.com%2FHTML%2Ftypo3conf%2Fext%2Fnaksci_podcast%2Fgnome-settings-sound.gif&hash=f2b0d108dc173aeaa367f8db2e2171bd) Listen to it now[/chapter] or [download as MP3] (http://nakeddiscovery.com/downloads/split_individual/13.02.07/Naked_Scientists_Show_13.02.07_1000410.mp3)

Title: Re: How did the solar system form?
Post by: CliffordK on 11/02/2013 22:21:15

Would part of the planet and space object formation be like temperature dependent crystal growth?

If one had a bunch of ice cubes at low temperatures of about 4K, they might tend to bounce off of each other.  However, any free H₂O molecules would readily stick to them causing the individual crystals to grow. 

That is, as long as the temperature is such that the crystal growth process occurs faster than sublimation. 

Likewise, as one is growing small planetoids , there would likely be temperatures where rocks would tend to crystallize out of gas clouds. 

Hot liquids may also tend to coalesce, as long as the vapor pressure is low enough that they would not evaporate.  Even so, high melting point gases would tend to eventually re-deposit on crystals.

As the planetoid grows, there would be a point where gravity would take over as a binding agent.

If there are too many small objects, and not enough free gas, as in the rings of Saturn, it may be difficult for the objects to bind together.

In fact, some meteorites show crystalline structures.  It would be difficult for crystals to grow with the coalescence of rocky debris, but they would readily grow with vapor deposition, or merging of and cooling of hot liquids.  The two forms of crystal growth could potentially be differentiated.

Title: Re: How did the solar system form?
Post by: Spacetectonics on 12/02/2013 08:33:02

One thing  ,I always wonder about is "why all the planets (at Venus transit, for instance ) are not at the same plane,orbiting sun?

" why some planes tilted when orbiting the sun?(considering gravity structure!!) if it is based on  " theory of two stars in original solar system"??