{{tag>precession zodiac}}

<title>Precession and Change of Zodiac Signs</title>
===== General Description of the Simulation =====
Due to the precession of the Earth orbital plane, the reference point of the Equatorial Coordinate, Vernal Equinox, marches across the celestial sphere. This causes the change of Right Ascension of celestial objects hence the change of zodiac signs in every 2,000 years. This simulation describes this phenomenon.

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~~ Important/key tasks to be completed for this simulation ~~
<panel type="danger" title="Pending Tasks">
Important pending tasks (or notes/ideas) to complete the simulation. 
  * Task 1
  * Task 2
  * ...
</panel>
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~~ Technical Aspects of the simulation: prerequisites, products, etc. ~~
<panel type="primary" title="Technical Aspects">
=== Prerequisites ===
These are technical prerequisites (3D model components) to create this simulation.
  * item 1
  * ...

=== Newly created components from this simulation ===
These are newly created components (functions, materials, cameras, etc.) from this topic simulation.
  * New component 1
  * ...
</panel>

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~~ Astronomical/Astrophysical Concepts ~~
<panel type="success" title="Astro Concepts">
These are underlying astronomical concepts to teach with this simulated topic.
  * Concept 1
  * ...
</panel>

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~~ Scenes created in the simulation ~~
<panel type="warning" title="Key Scenes">
These are key scenes of the simulation; based on ''storyboard'' files. 
  * Scene 1
  * ...
</panel>

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