<p>Based on what I can access right now, the precession of Earth's axes are in a cone shape, so there isn't much wobble. But with all of those Near-Earth Objects, and nearby planets, there is <strong>probably</strong> some wobble (I'm no professional). </p>

<p>There's also this thing called the Milankovitch Cycle, which shows how the combined effects of precession, external forces, and etc. affect climate. It also affects the <strong>eccentricity</strong>, or the circularity, of Earth's orbit in a cycle of 430,000 years. This affects seasonal length and season intensity. It also changes orbit orientation, so the perihelion and aphelion move to different locations. If you want to learn more, read <a href="https://en.wikipedia.org/wiki/Milankovitch_cycles" rel="nofollow">https://en.wikipedia.org/wiki/Milankovitch_cycles</a>.</p>

CC BY-SA 3.0
2015-03-19T04:03:45.840Z
2015-03-19T04:03:45.840Z
Aryaman
<p>The Wikipedia <a href="http://en.m.wikipedia.org/wiki/Precession" rel="nofollow">Precession</a> article explains this.</p>

<p>Precession of the Earth's axis is caused mainly by the Sun's gravity acting on the oblate spheriod of the Earth. The Earth bulges at the equator and the force of the Sun's gravity on the bulge makes the axis wobble like a child's spinning top - the axis traces out a cone shape in space. It has no effect on the Earth's orbit. </p>

<p>Perihelion precession is caused by the gravity of Jupiter and the other outer planets.</p>

CC BY-SA 3.0
2015-02-15T22:57:40.253Z
2015-02-15T22:57:40.253Z
andy256
<p>It's been known that the Earth's axial tilt varies from 22.5 to 24.5. Does this result in a wobbling while the value of the tilt varies about these two limits? If so, how does it affect the mechanics of the Earth's movement (its rotation and revolution about the Sun)?</p>

<orbit><solar-system><earth><rotation>
Precessing of the Earth
stp30
# Precessing of the Earth

(Asked by: username_0 on 2015-02-15)

It's been known that the Earth's axial tilt varies from 22.5 to 24.5. Does this result in a wobbling while the value of the tilt varies about these two limits? If so, how does it affect the mechanics of the Earth's movement (its rotation and revolution about the Sun)?

**Tags:** orbit, solar-system, earth, rotation


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## 2 answers

### Answer by username_1 on 2015-03-19. Score: 1

Based on what I can access right now, the precession of Earth's axes are in a cone shape, so there isn't much wobble. But with all of those Near-Earth Objects, and nearby planets, there is **probably** some wobble (I'm no professional).

There's also this thing called the Milankovitch Cycle, which shows how the combined effects of precession, external forces, and etc. affect climate. It also affects the **eccentricity**, or the circularity, of Earth's orbit in a cycle of 430,000 years. This affects seasonal length and season intensity. It also changes orbit orientation, so the perihelion and aphelion move to different locations. If you want to learn more, read <https://en.wikipedia.org/wiki/Milankovitch_cycles>.


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### Answer by username_2 on 2015-02-15. Score: 1

The Wikipedia [Precession](http://en.m.wikipedia.org/wiki/Precession) article explains this.

Precession of the Earth's axis is caused mainly by the Sun's gravity acting on the oblate spheriod of the Earth. The Earth bulges at the equator and the force of the Sun's gravity on the bulge makes the axis wobble like a child's spinning top - the axis traces out a cone shape in space. It has no effect on the Earth's orbit.

Perihelion precession is caused by the gravity of Jupiter and the other outer planets.


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