In addition, Celestia's binary star catalogs only describe a few hundred systems of multiple stars. As a result, the constellations in Celestia do not gradually change shape as they do in the real world. Some are available as add-ons.Īlthough objects that form part of a planetary system move, and stars rotate about their axes and orbit each other in multiple star systems, stellar proper motion is not simulated, and galaxies are at fixed locations. Variable stars, supernovae, black holes, and nebulae are missing from the standard distribution. Many types of astronomical objects are not included with Celestia. The irregular surface of the Earth causes low Earth orbit satellites to appear to be in the wrong places in the sky when watched from Celestia's ground, even when the Earth's oblateness is specified. The default setting for Celestia's Earth is a spheroid. The extension mechanism uses Lua as its built-in scripting language. Celestia's support for gamepads and joysticks is relatively limited.Ĭelestia can be extended with new objects, and has support for third-party, user-created add-ons available for installation, both fictional and realistic. Screenshots and movies can be captured in classic or HD resolutions. The user can change Celestia's field of view, and allows users to split the window into multiple panes. Information about the objects that Celestia draws can also be displayed. Ĭelestia simulates the appearance of atmospheres on planets and moons, planetshine on orbiting satellites, and miscellaneous planetary details such as sunrise and sunset. The time simulated by Celestia can be set to any time 2 billion years forward or backward from the present, although planetary orbits are only accurate within a few thousand years of the present day, and date arithmetic overflows at the year 5,874,774. Light time delay is an optional function. Using the installed catalogues, the names of celestial objects can be displayed, including artificial satellites, as well as the names and locations of Earth features.Ĭelestia allows users to navigate at different speeds, and allow users to orbit stars, planets, moons, and other space objects, track space objects such as spacecraft, asteroids, and comets as they fly by, or travel to and/or fly through galaxies. Celestia uses the VSOP87 theory of planetary orbits to provide a solar and lunar eclipse finder and to display the orbital paths of planets (including extrasolar planets), dwarf planets, moons, asteroids, comets, artificial satellites, and spacecraft. Ĭelestia displays the Hipparcos Catalogue (HIP) of 118,322 stars and a compiled catalogue of galaxies. Between 2001 and May 2017, the former central distribution site SourceForge counted approximately 12 million downloads.
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Ĭelestia is available for download from free software websites. As of 2020 beta testing builds of version 1.7.0 are available, as well as the bugfix release 1.6.2.
In late 2016, the official Celestia forums were restored, and development restarted. Since then, some of its development team went to work on Celestia.sci, a cosmological visualizer. It is free and open source software released under the GNU General Public License.Ĭelestia's development stopped in 2013, with the final release in 2011. Ĭelestia is available for AmigaOS 4, Linux, macOS, Microsoft Windows, iOS, and Android.
Celestia can display objects of various scales using OpenGL. The program allows users to virtually travel through a simulated version of our universe. AmigaOS 4, BSD, Linux, macOS, Microsoft Windows, iOS, AndroidĬelestia is a 3D astronomy software program created by Chris Laurel.
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