Registered by Rob Spearman

Travel through space and time with this astronomy simulation and visualization software. Teach or learn about astronomy, Earth science, and related topics. Our emphasis is on usability, realism, stability, and performance.

New development is occurring only on Nightshade NG. Learn more at

Project information

Rob Spearman
GNU GPL v3, Public Domain, Other/Open Source
(Some sections of code such as the planetephems library are provided with BSD-like licenses. See the header files for license details. Some images are provided for use with attribution only. See the README file in the root of the source tree for full details.)

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trunk series is the current focus of development.

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