<p>It is generally thought that Jupiter "formed" first via the core accretion process. An icy core forms first and then sweeps up the gas around it. This process is generally thought to take from a few million to ten million years. After that, the solar system gas was dissipated and Jupiter was basically as it is today, but larger and hotter.</p>

<p>Earth formed on a longer timescale in the maelstrom of rocky planetesimals that made up the inner solar system. An essential part of the process was the collision that formed the moon, which probably occurred between 30 and 60 million years after the protosun began to form. Further heavy bombardment of the Earth that may have significantly changed its surface and atmosphere continued for some tens of millions of years after that.</p>

<p>The wikipedia page on planet formation in the solar system looks ok to me
<a href="https://en.wikipedia.org/wiki/Formation_and_evolution_of_the_Solar_System" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Formation_and_evolution_of_the_Solar_System</a>
I may add some more academic references subsequently.</p>

CC BY-SA 4.0
2016-06-13T18:26:02.097Z
2019-11-05T17:34:21.520Z
2019-11-05T17:34:21.520Z
ProfRob
<p>What is the age difference between Jupiter &amp; Earth?</p>

<p>Which planet was formed first, or were they formed at the same time?</p>

CC BY-SA 3.0
2016-06-13T11:33:37.947Z
They were formed roughly around the same time, when the solar-system formed.  It's possible Jupiter formed first, which resulted in it's greater mass, but it's very difficult to run the models backwards and make accurate predictions.   It's thought to take a few million years for planets to form.   http://galacticinteractions.scientopia.org/2010/01/05/how-long-does-it-take-planets-to-form/   http://askanastronomer.org/planets/2015/10/25/forming-planets/
userLTK
CC BY-SA 3.0
2016-06-13T12:33:23.210Z
Apart from @userLTKs answer “at the same time”, I don't think we (as in, humans in general) have any way of reliably answering this question at this time.
gerrit
CC BY-SA 3.0
2016-06-13T18:28:46.890Z
@userLTK speculation and total reliance on models is not required here. The Earth formed over a considerably longer timescale than Jupiter.
ProfRob
CC BY-SA 3.0
2016-06-13T19:58:37.937Z
I'm voting to close this question as off-topic because this is extremely available information and will not benefit anyone.
Sir Cumference
CC BY-SA 3.0
2016-06-17T02:14:23.947Z
@userLTK Please don't post answers in the comments.
rob
CC BY-SA 3.0
2016-06-17T02:39:06.367Z
@rob even if it's an incomplete answer?  (and it turns out, incorrect as well, but I left it up for the 2 links)
userLTK
CC BY-SA 3.0
2016-06-17T21:49:25.600Z
Yes, even then.  Incomplete answers can be edited and fleshed out, and incorrect answers can be downvoted or fixed. [Further](http://meta.physics.stackexchange.com/q/5966/44126) [discussion](http://meta.workplace.stackexchange.com/q/72) [should](http://meta.stackexchange.com/q/17447/280545) [happen](http://meta.stackexchange.com/q/4217/280545) on the [meta](http://meta.astronomy.stackexchange.com/).
rob
<solar-system>
What is the Age Difference Between Earth & Jupiter?
RANSARA009
# What is the Age Difference Between Earth & Jupiter?

(Asked by: username_0 on 2016-06-13)

What is the age difference between Jupiter & Earth?

Which planet was formed first, or were they formed at the same time?

**Tags:** solar-system

> **Comments:**
> **username_1**: They were formed roughly around the same time, when the solar-system formed.  It's possible Jupiter formed first, which resulted in it's greater mass, but it's very difficult to run the models backwards and make accurate predictions.   It's thought to take a few million years for planets to form.   http://galacticinteractions.scientopia.org/2010/01/05/how-long-does-it-take-planets-to-form/   http://askanastronomer.org/planets/2015/10/25/forming-planets/  
> **username_2**: Apart from @userLTKs answer “at the same time”, I don't think we (as in, humans in general) have any way of reliably answering this question at this time.  
> **username_3**: @username_1 speculation and total reliance on models is not required here. The Earth formed over a considerably longer timescale than Jupiter.  
> **username_4**: I'm voting to close this question as off-topic because this is extremely available information and will not benefit anyone.  
> **username_5**: @username_1 Please don't post answers in the comments.  
> **username_1**: @username_5 even if it's an incomplete answer?  (and it turns out, incorrect as well, but I left it up for the 2 links)  
> **username_5**: Yes, even then.  Incomplete answers can be edited and fleshed out, and incorrect answers can be downvoted or fixed. [Further](http://meta.physics.stackexchange.com/q/5966/44126) [discussion](http://meta.workplace.stackexchange.com/q/72) [should](http://meta.stackexchange.com/q/17447/280545) [happen](http://meta.stackexchange.com/q/4217/280545) on the [meta](http://meta.astronomy.stackexchange.com/).  

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## 1 answers

### Answer by username_3 on 2016-06-13. Score: 11 | Accepted answer

It is generally thought that Jupiter "formed" first via the core accretion process. An icy core forms first and then sweeps up the gas around it. This process is generally thought to take from a few million to ten million years. After that, the solar system gas was dissipated and Jupiter was basically as it is today, but larger and hotter.

Earth formed on a longer timescale in the maelstrom of rocky planetesimals that made up the inner solar system. An essential part of the process was the collision that formed the moon, which probably occurred between 30 and 60 million years after the protosun began to form. Further heavy bombardment of the Earth that may have significantly changed its surface and atmosphere continued for some tens of millions of years after that.

The wikipedia page on planet formation in the solar system looks ok to me
<https://en.wikipedia.org/wiki/Formation_and_evolution_of_the_Solar_System>
I may add some more academic references subsequently.


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