<blockquote>
  <p>Does it originate from super earth with excessive collection of
  hydrogen?</p>
</blockquote>

<p>Basically no, and this is why:</p>

<p><a href="https://i.sstatic.net/eq4si.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/eq4si.jpg" alt="enter image description here"></a>
<em>Source from the water article linked below.</em></p>

<p>Jupiter likely formed outside the <a href="https://en.wikipedia.org/wiki/Frost_line_%28astrophysics%29" rel="nofollow noreferrer">frost-line</a>, so it never had a rocky or even a molten magma surface.  It formed with much too high a percentage of ices, which, under pressure, became hot gas and perhaps, at one time, a very deep ocean around the whole planet.</p>

<p>As Rob Jeffries said, the formation of Jupiter isn't well understood, so there's some uncertainty there, but I don't see how a planet that forms with as much water, CO2, NH3 and other gases as Jupiter did could ever form what we would consider a solid surface.  It's large size and heat of formation probably kept it highly gaseous during it's entire formation.   Perhaps it was once a water world of sorts, but my guess is it always resembled a gas giant once it was recognizable as a planet.</p>

<p>The Earth is about <a href="http://www.universetoday.com/65588/what-percent-of-earth-is-water/" rel="nofollow noreferrer">0.02% water</a> (some websites say 0.05% but whichever percentage, the Earth is still almost entirely Rocky Mantle &amp; Metallic core.   I don't think a planet that forms outside the frost line would ever become Earth like or a super-earth.   </p>

<p>Inside the frost line, A super earth could in time become a gas giant, but outside, I don't think so.</p>

<p>That said, Jupiter might well have an earth like ratio of elements at it's core, but I don't believe that means it was ever a super-earth.</p>

CC BY-SA 3.0
2015-10-28T10:09:17.533Z
2015-10-28T10:09:17.533Z
userLTK
<p>Jupiter <em>probably</em> originated with a dense core, and then accreted a gaseous envelope. To call the core "rocky" could be misnomer, since the planet formed much further out from the Sun where it may have been possible to form ices. The exact location of Jupiter's birth and the composition of its core are not known, but the composition was unlikely to have been the same as Earth. It is also probable (again, theory not fact), that Jupiter's core may have reached multiple Earth masses before accreting the gaseous envelope.</p>

CC BY-SA 3.0
2015-10-28T08:52:11.803Z
2015-10-28T08:52:11.803Z
ProfRob
<p>Often I see books which state that Jupiter has a rocky core, if it is true, does it originate from super earth with excessive collection of hydrogen?</p>

<jupiter>
Is Jupiter just a super earth with hydrogen atmosphere?
Gstestso
# Is Jupiter just a super earth with hydrogen atmosphere?

(Asked by: username_0 on 2015-10-28)

Often I see books which state that Jupiter has a rocky core, if it is true, does it originate from super earth with excessive collection of hydrogen?

**Tags:** jupiter


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## 2 answers

### Answer by username_1 on 2015-10-28. Score: 1 | Accepted answer

> Does it originate from super earth with excessive collection of
> hydrogen?

Basically no, and this is why:

[![enter image description here](https://i.sstatic.net/eq4si.jpg)](https://i.sstatic.net/eq4si.jpg)
*Source from the water article linked below.*

Jupiter likely formed outside the [frost-line](https://en.wikipedia.org/wiki/Frost_line_%28astrophysics%29), so it never had a rocky or even a molten magma surface. It formed with much too high a percentage of ices, which, under pressure, became hot gas and perhaps, at one time, a very deep ocean around the whole planet.

As Rob Jeffries said, the formation of Jupiter isn't well understood, so there's some uncertainty there, but I don't see how a planet that forms with as much water, CO2, NH3 and other gases as Jupiter did could ever form what we would consider a solid surface. It's large size and heat of formation probably kept it highly gaseous during it's entire formation. Perhaps it was once a water world of sorts, but my guess is it always resembled a gas giant once it was recognizable as a planet.

The Earth is about [0.02% water](http://www.universetoday.com/65588/what-percent-of-earth-is-water/) (some websites say 0.05% but whichever percentage, the Earth is still almost entirely Rocky Mantle & Metallic core. I don't think a planet that forms outside the frost line would ever become Earth like or a super-earth.

Inside the frost line, A super earth could in time become a gas giant, but outside, I don't think so.

That said, Jupiter might well have an earth like ratio of elements at it's core, but I don't believe that means it was ever a super-earth.


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### Answer by username_2 on 2015-10-28. Score: 2

Jupiter *probably* originated with a dense core, and then accreted a gaseous envelope. To call the core "rocky" could be misnomer, since the planet formed much further out from the Sun where it may have been possible to form ices. The exact location of Jupiter's birth and the composition of its core are not known, but the composition was unlikely to have been the same as Earth. It is also probable (again, theory not fact), that Jupiter's core may have reached multiple Earth masses before accreting the gaseous envelope.


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