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Welcome to the AAS WorldWide Telescope Contributor Hub!

The AAS WorldWide Telescope (WWT) is a free, open-source tool for visually exploring humanity’s scientific understanding of the Universe. WWT is primarily a website that allows anyone to interactively explore terabytes of astronomical data in a seamlessly integrated 4D simulation of the known universe. But the WWT software ecosystem also includes a Windows application that can power planetariums, a cloud-based web service for discovering and sharing astronomical data, and a Python module allowing users to write their own software to control and extend all of these systems.

WWT is brought to you by the non-profit American Astronomical Society (AAS) and the .NET Foundation. Established in 1899 and based in Washington, DC, the AAS is the major organization of professional astronomers in North America.

For developers:

Stay in Touch!

Here are some ways you can communicate with the folks who make the project happen:


WWT documentation is now organized on the WWT Documentation Hub,

Get Involved

We would love your help in making WWT better! Please read the WWT Contributors’ Guide and WWT Code of Conduct to get started. The source code for this site lives at the repository.


The AAS WorldWide Telescope system is a .NET Foundation project managed by the non-profit American Astronomical Society (AAS). Work on WWT has been supported by the AAS, the US National Science Foundation, and other partners. See the WWT user website for details.

Copyright 2019-2022 the .NET Foundation. AAS WorldWide Telescope is brought to you by the American Astronomical Society and other supporters.