Celestia

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Celestia provides photo-realistic, real-time, three-dimensional viewing of the solar system, the galaxy and the universe. It is an easy to use, freely-distributed, multi-platform, open source, software package which has become a valuable tool for astronomy education. Used in homes, schools, museums and planetariums around the world, it also is used as a visualization tool by space mission designers. Versions are available for computers running Windows, Macintosh (MacOS X) and Linux operating systems.

Although it is optimized for 3D astronomical visualization, Celestia can be used to display and explore other 3D environments, too.

And, for some reason, many people seem to find exploring with Celestia to be a lot of fun.

Contents 1 About This Guide 2 Using Celestia 2.1 Getting Celestia to Run 2.2 Exploring Celestia's Universe 2.3 Understanding Celestia 3 Enhancing Celestia 3.1 Scripting 3.2 Customizing Celestia 3.3 Troubleshooting 3.4 Development 3.5 Credits 4 External links 4.1 Related WikiBooks 4.2 Celestia Web Sites 4.3 Celestia Add-ons 4.4 Articles about Celestia

[edit] About This Guide

This Guide to Celestia is intended to be a comprehensive source of information for students, educators, and other users of Celestia. It will include instructions for obtaining, installing, using, customizing, and troubleshooting the Celestia software, as well as explanations of concepts and techniques from astronomy and computer graphics as needed to fully explore and understand Celestia and its universe. It is intended to address the needs of novice, casual, and advanced users.

The Guide to Celestia is just beginning development and is very far from complete. You can help by adding useful content. Members of the Celestia community are encouraged to be bold in editing this WikiBook to provide the additions and corrections needed to make it useful for themselves and others. Please share your knowledge here.

Icons indicate approximate development status.
Of course, all pages are subject to improvement at any time.

Wikibook Development Stages
Sparse text	Developing text	Maturing text	Developed text	Comprehensive text:

[edit] Using Celestia

How to use Celestia is described in detail in Frank Gregorio's Celestia 1.4.1 User's Guide.

• Why Celestia?

[edit] Getting Celestia to Run

• Download and Installation
• Graphics Hardware
• Display Options
• Render Paths
• Celestia's Command Line

[edit] Exploring Celestia's Universe

• Getting Started: some usage examples
• Locations
• Navigation
  • View Control
  • Time Control
  • Bookmarks (cel: URLs)
• Snapshots and Movies

[edit] Understanding Celestia

• FAQs: Frequently Asked Questions
• Glossary of Celestia terminology

[edit] Enhancing Celestia

The following reference pages will help you to add features and make Celestia easier to use in your environment.

[edit] Scripting

• Scripting Overview
  • Cel Scripting
  • CelX Scripting
    • Introduction to CELX Scripting
    • CELX Lua Methods: a list of CELX functions
    • CELX Questions and Answers
      • Angles Between Two Objects
      • Assigning Keyboard Functions
    • CELX Development Suggestions

[edit] Customizing Celestia

• Configuring Celestia: celestia.cfg

• Catalog Files: Defining new Objects
  • SSC: Solar System Catalogs of Planets and their Satellites
  • STC: STar Catalogs
  • DSC: Deep Space Catalogs of Nebulae and Galaxies

• Positioning Objects: Flying through Time and Space
  • Orbits & Trajectories (updated for v1.5)
    • JPL Ephemerides (new in v1.5)
    • Reference Frames (new in v1.5)
  • Rotation Models (new in v1.5)
  • Scripting Positions Some Implications of Scripted Methods

• Keeping up Appearances
  • Simple Add-Ons: Replacing Textures & Locating Catalogs
  • Creating Textures: Painting Planets
  • 3D Models: Sculpting Satellites
    • CMS models
    • CMOD models

• Specifying the Correct Time: TDB is not UTC
  • Time Scales (new in v1.5)

[edit] Troubleshooting

• Celestia/Troubleshooting Celestia
• Troubleshooting Scripts
  • CELX Development Suggestions

• Celestia/Troubleshooting Addons

[edit] Development

• Development: Compiling Celestia for yourself
  • Linux
  • MacOS X
  • Windows Vista
  • Windows XP 32bit
    • Win CVS
    • Tortoise CVS

• Development Road Map: Planned improvements and new features.
  • Features being considered for v1.6.0
• Versions: Major Celestia milestones.
• Bugs and Feature Requests

[edit] Credits

• Acknowledgements: Contributors to Celestia and to this WikiBook.

[edit] External links

[edit] Related WikiBooks

• A-levelPhysics/Cosmology
• Astrodynamics
• Astronomy
• Glossary of Astronomical Terms
• Solar System
• WikiJunior: Solar System
• Sun
• The Universe Made Simple

[edit] Celestia Web Sites

• http://www.shatters.net/celestia/ - Home of Celestia
• http://sourceforge.net/project/showfiles.php?group_id=21302 - Celestia binaries and source code
• http://www.shatters.net/forum/ - Celestia Discussion Forum
• http://www.lepp.cornell.edu/~seb/celestia/ - Selden's List of Resources for Celestia
• http://de.wikipedia.org/wiki/Celestia - German wikipedia
• http://fr.wikipedia.org/wiki/Celestia - French wikipedia
• http://fr.wikibooks.org/wiki/Celestia - French WikiBook
• http://www.ikiru.ch/celestia/wiki/index.php/Accueil - French Celestia Wiki

[edit] Celestia Add-ons

• http://www.celestialmatters.org/ - Celestial Matters web site: Celestia add-ons and other content of interest to Celestia users
• http://forum.celestialmatters.org/index.php - Celestial Matters forum
• http://www.celestiamotherlode.net/ - The main add-ons repository
• http://www.ikiru.ch/celestia/ - French repository of add-ons with eMule links
• http://jeam.tag.free.fr/CELESTIAhtml/Celestia-Addons.htm - French Catalog of the add-ons
• http://www.celestiamotherlode.net/catalog/educational.php - A website containing detailed Celestia educational resources and journeys

• http://forum.celestialmatters.org/viewforum.php?f=6 - Celestial Matters - F-TexTools and refereed Add-ons

[edit] Articles about Celestia

• http://www.linux-magazine.com/issue/58/Celestia_3D_Space_Simulation.pdf - Linux magazine article
• http://discovermagazine.com/2004/nov/emerging-technology/ - Discover magazine article

• http://web.archive.org/web/20051224085847/http://www.esa.int/gsp/ACT/mission_analysis/designtool_overview.htm - ESA Advanced Concepts Team overview of design tools
• http://www.tiempolibresite.com/content/view/482/2/ - Interview of Chris Laurel by TiempoLibreSite