<p>The gravitational pull of all the planets and the sun, and the rest of the galaxy and the universe, all play a part, but gravitational effects fall off with distance.</p>

<p>For Earth's orbit, the Sun is far and away the single biggest influence. Jupiter perturbs our orbit slightly, but with it or without it we have a simple elliptical orbit round the sun. We can measure the perturbation in our orbit from all the planets, but the effects are minor.</p>

<p>When it comes to gravitational effects on small bodies passing one of the planets, however, the effects can be dramatic - an asteroid passing close to Jupiter will be moved far from its original path. The same would be true when passing close to Saturn or in fact any planet - just to a lesser degree.</p>

<p>So while you can't say that Jupiter protects Earth from anything, especially not the Oort Cloud, you also can't say that it draws objects in. Anything out in the Kuiper belt or Oort cloud will be orbiting the barycentre of the solar system (which is within the Sun) and will keep doing that unless knocked out by something  like a collision with another object, or the pull of other Kuiper belt objects like Pluto, which can give a much greater tug.</p>

CC BY-SA 3.0
2013-10-27T23:11:59.407Z
Pluto's gravity isn't going to have any significant effect on bodies in the Oort cloud.
Keith Thompson
CC BY-SA 3.0
2013-10-28T11:56:46.877Z
I didn't mean to imply that it would. As a Kuiper Belt Object itself, it **will** have an effect on other Kuiper Belt Objects.
Rory Alsop
CC BY-SA 3.0
2013-10-24T13:28:06.123Z
2013-10-24T13:28:06.123Z
Rory Alsop
<p>For instance, Jupiter is the biggest planet in our solar system. Due to it's gravitational mass it can deflect meteorites and protect Earth from the Oort cloud.  While these are positives, the negative effects are that Jupiter can draw comets in from the Kuiper belt which may have catastrophic consequences.  </p>

<p>Do other planets have a similar effect on the solar system?</p>

CC BY-SA 3.0
2013-10-24T10:33:22.457Z
Any sources on the Jupiter - Oort cloud connection? Sounds interesting and I haven't heard of it before.
SF.
CC BY-SA 3.0
2013-10-24T13:03:17.573Z
Also, I'm not sure what you mean by 'Due to it's gravitational mass it keeps planets in orbit'. Could you reword or elaborate?
astromax
CC BY-SA 3.0
2013-10-24T13:12:18.920Z
@astromax - I have removed that line from my question as it may be inaccurate. I was under the assumption that each planet orbits the sun and the gravitational pull of both the Sun and Jupiter played a role in the orbital path for each planet.
Darren
CC BY-SA 3.0
2013-10-24T13:28:46.957Z
This question would be better placed at Physics.SE
Rory Alsop
CC BY-SA 3.0
2013-10-24T17:07:06.517Z
@SF. There is no connection between Jupiter and the Oort cloud. As Rory Alsop points out in his answer, because gravity falls off with the square of the distance, Jupiter has no effect on the Oort cloud.
Donald.McLean
<solar-system><planet>
What effects do other planets have on the solar system?
Darren
# What effects do other planets have on the solar system?

(Asked by: username_0 on 2013-10-24)

For instance, Jupiter is the biggest planet in our solar system. Due to it's gravitational mass it can deflect meteorites and protect Earth from the Oort cloud. While these are positives, the negative effects are that Jupiter can draw comets in from the Kuiper belt which may have catastrophic consequences.

Do other planets have a similar effect on the solar system?

**Tags:** solar-system, planet

> **Comments:**
> **username_1**: Any sources on the Jupiter - Oort cloud connection? Sounds interesting and I haven't heard of it before.  
> **username_2**: Also, I'm not sure what you mean by 'Due to it's gravitational mass it keeps planets in orbit'. Could you reword or elaborate?  
> **username_0**: @username_2 - I have removed that line from my question as it may be inaccurate. I was under the assumption that each planet orbits the sun and the gravitational pull of both the Sun and Jupiter played a role in the orbital path for each planet.  
> **username_3**: This question would be better placed at Physics.SE  
> **username_4**: @username_1 There is no connection between Jupiter and the Oort cloud. As username_3 points out in his answer, because gravity falls off with the square of the distance, Jupiter has no effect on the Oort cloud.  

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## 1 answers

### Answer by username_3 on 2013-10-24. Score: 5 | Accepted answer

The gravitational pull of all the planets and the sun, and the rest of the galaxy and the universe, all play a part, but gravitational effects fall off with distance.

For Earth's orbit, the Sun is far and away the single biggest influence. Jupiter perturbs our orbit slightly, but with it or without it we have a simple elliptical orbit round the sun. We can measure the perturbation in our orbit from all the planets, but the effects are minor.

When it comes to gravitational effects on small bodies passing one of the planets, however, the effects can be dramatic - an asteroid passing close to Jupiter will be moved far from its original path. The same would be true when passing close to Saturn or in fact any planet - just to a lesser degree.

So while you can't say that Jupiter protects Earth from anything, especially not the Oort Cloud, you also can't say that it draws objects in. Anything out in the Kuiper belt or Oort cloud will be orbiting the barycentre of the solar system (which is within the Sun) and will keep doing that unless knocked out by something like a collision with another object, or the pull of other Kuiper belt objects like Pluto, which can give a much greater tug.

> **Comments:**
> **username_5**: Pluto's gravity isn't going to have any significant effect on bodies in the Oort cloud.  
> **username_3**: I didn't mean to imply that it would. As a Kuiper Belt Object itself, it **will** have an effect on other Kuiper Belt Objects.  

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