# Celestia Portable Help

## the portable space simulator

The free space simulation that lets you explore our universe in three dimensions. Celestia runs on Windows, Linux, and Mac OS X. Unlike most planetarium software, Celestia doesn't confine you to the surface of the Earth. You can travel throughout the solar system, to any of over 100,000 stars, or even beyond the galaxy. All movement in Celestia is seamless; the exponential zoom feature lets you explore space across a huge range of scales, from galaxy clusters down to spacecraft only a few meters across. A 'point-and-goto' interface makes it simple to navigate through the universe to the object you want to visit. Celestia is expandable. Celestia comes with a large catalog of stars, galaxies, planets, moons, asteroids, comets, and spacecraft. If that's not enough, you can download dozens of easy to install add-ons with more objects. Learn more about Celestia...

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This software is OSI Certified Open Source Software. OSI Certified is a certification mark of the Open Source Initiative.

## Portable App Issues

Get help installing and using Celestia Portable on the Celestia Portable Thread.

## General Celestia Issues

- Celestia Website
- Celestia Forum
- Celestia Bugs Forum
- Celestia Add-Ons