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Windows 7: How the First Planets Formed

23 Aug 2009   #1

 
 
How the First Planets Formed

Quote:
How the First Planets Formed

Asteroids jumped in size significantly

Questions related to how the solar system appeared some 4.7 billion years ago have been around since the first people started using their brains for more than capturing their next meal. Science has only recently been able to provide some preliminary answers to this type of questions, although numerous ones still remain unanswered. Now, experts at the NASA Jet Propulsion Laboratory (JPL), in Pasadena, California, solve a small piece of the mystery, by proposing a theory on how the planets in the solar system today formed.

Astronomical observations have thus far revealed the fact that young stars, which have just formed, are generally surrounded by a ring of debris left from their own formation, called the protoplanetary disk. These structures are the precursors of large-scale planets, in spite of the fact that they are only made up of dust at first. According to a leading theory on how planets formed, grains of dust would orbit the newly formed star at high speeds, bumping and clogging with each other, until they formed larger grains of dust.

Through numerous cycle repeats, the grains would eventually reach the size of small rocks, and so on. After a while, the theory goes, some of these rocks would grow to asteroid sizes, and then beyond, to small planets. The problem with this line of reasoning is that space rocks larger than one meter (three feet) in diameter would have been significantly slowed down by gas in the protoplanetary disk, which would have caused them to spiral down into the Sun and get vaporized. According to the new theory, it may be that the small rocks “jumped” in size suddenly, from one meter to several kilometers in diameter.

The newly formed objects would have had enough drag to plow through the protoplanetary disk under these circumstances, overcoming the influence of the gas, whilst having their own orbits only slightly modified. The data used for this conclusion was drawn from astronomical observations, which show that asteroids less than one kilometer in diameter can be found in abundance, while the number of those over this limit is extremely limited. The JPL experts propose that the asteroids we see today are what was left behind after the original, much larger ones, broke apart.
Source: Softpedia
My System SpecsSystem Spec
23 Aug 2009   #2

64-bit Windows 8.1 Pro
 
 

Its getting too late for these types of questions....
My System SpecsSystem Spec
24 Aug 2009   #3

Windows 7 Professional 64-bit
 
 

I knew this being keen in astronomy and I try to never miss an episode of Sky at Night.
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24 Aug 2009   #4

Windows 7 Ultimate 64Bit
 
 

In the beginning God created the heavens and the earth. That's my belief.
My System SpecsSystem Spec
24 Aug 2009   #5

Windows 7
 
 



This should answer all your questions
My System SpecsSystem Spec
24 Aug 2009   #6

Windows 7
 
 

Glad you watched the video, The quotes at the end of the video is the best part.
My System SpecsSystem Spec
25 Aug 2009   #7

Windows 7 Ultimate 64Bit
 
 

Quote   Quote: Originally Posted by Steve123MC View Post
Glad you watched the video, The quotes at the end of the video is the best part.
u mean the printed bits or the narrative?

as for God being tired that's just absurd,
'..due to the abundance of dynamic energy, he also being vigorous in power' Isa 40:26
My System SpecsSystem Spec
25 Aug 2009   #8

Windows 7 Ultimate x32
 
 

i think 'god' and science should stay in their designated corners, or this thread could get real ugly.

interesting read Sassa.
My System SpecsSystem Spec
25 Aug 2009   #9

 
 

Quote   Quote: Originally Posted by holo88 View Post
i think 'god' and science should stay in their designated corners, or this thread could get real ugly.

interesting read Sassa.
Interesting indeed...
My System SpecsSystem Spec
25 Aug 2009   #10

Windows 7 Ultimate x32
 
 

Quote   Quote: Originally Posted by Sassa View Post
Interesting indeed...
i smell a hint of hostility. am i wrong?
i say that because of personal experience. a few years ago, on a forum far far away, someone fired up the "age old question". it quickly turned into a wildfire argument of titanic proportions that resulted in 20+ consecutive banns. some of them high ranked members. i personally didnt 'get the axe' nor did i instigate the breakout. i was merely an observer to the chaos. i'd rather not see anyone get booted for the same thing, here. i have grown rather fond of this forum, and hope that it will continue with it's colorful characters, not ripping each others throats out, trying to prove themselves right in such a way. it just to much of a touchy subject for anyone to maintain a sturdy rational state. i hope you can understand where im going with this (all of you). well then...

did anyone happen to catch that episodic series on the Discovery channel? *forgot name, googling* *cant find*. anyway, it was based on the theory that at one point, all of the mass in the universe was in one HUGE mass. that hit critical mass, blew up, and sent billions upon billions of particles through out space, which resulted in all the planets/ stars and such. it was a very intriguing story. i think it aired last summer. if i find it, i'll have to post it here.
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