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Empowering flight dynamics engineers with open-source software

Nyx is revolutionizing the field of flight dynamics engineering as a powerful, open-source tool for mission design and orbit determination. From trajectory optimization to orbit estimation, Nyx is built for speed, automation, and scalability.

Nyx has proven mission-critical reliability, already contributing to the success of several lunar missions including Firefly Blue Ghost 1 and NASA/Adanced Space CAPSTONE.

The core of Nyx is provided under theAGPLv3 License. The foundational components of Nyx are open-source and accessible to everyone.

By using this software, you assume responsibility for adhering to the license. Refer tothe pricing page for an FAQ on the AGPLv3 license. Notably, any software that incorporates, links to, or depends on Nyx must also be released under the AGPLv3 license, even if you distribute an unmodified version of Nyx.

Starting with version2.2.0-alpha, Nyx now offers a set of advanced functionalities available under apremium crate feature. This feature operates under adual-license model.

Thepremium feature is available for use free of charge under the standard AGPLv3 license for the following users:

• Individuals
• Non-profit organizations
• Academic institutions
• Commercial entities with annual gross revenue of$1,000,000 USD (one million) or less.

Use of any code enabled by thepremium feature isprohibited for any for-profit entity (including, but not limited to, companies, corporations, and organizations) whose annual gross revenue exceeds$1,000,000 USD.Entities exceeding this revenue thresholdmust purchase a commercial license to enable and use thepremium feature. This license grants you the right to use these advanced features in your commercial products and services.To inquire about a commercial license, please contact me atchristopher.rabotin@gmail.com or via thecontact form.

Note: under the assumption that most users are below this threshold, thepremium feature is enabledby default. As a useryou are responsible for ensuring compliance with the license by your entity and customers. It is enforced.

The website has the latest use cases

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The documentation is currently being updated. If you have specific use cases you would like to see documented, pleaseopen a Github issue oruse the contact form

To install Nyx, follow these steps:

1. Clone the repository:git clone https://github.com/nyx-space/nyx.git
2. Navigate to the directory:cd nyx
3. Run any of theexamples, e.g.RUST_LOG=info cargo run --example 01_orbit_prop --release

Nyx useslld, the LLVM linker, for faster compilation times. You may need to manually installlld depending on your distribution. On Ubuntu, this command issudo apt install clang lld.

For Python projects, get started by installing the library viapip:pip install nyx_space.

Important: The Python package has been temporarily disabled. Refer to#311 for details.

Nyx mostly adheres to SemVer. New patch versions should be rare. Updated dependencies trigger a new minor version.However new fields in structures and new behavior may also be added with minor releases, but the public facing initializers and functions should not significantly change (but may still change).

Major releases are for dramatic changes.

Chris Rabotin is a GNC and flight dynamics engineer with a heavy background in software.

I currently work for Rocket Lab USA as the lead flight dynamics engineer on the Blue Ghost lunar lander missions. -- Find me onLinkedIn.

Contributions are licensed under AGPLv3 and may also be relicensed under a commercial license by Nyx Space. Contributors retain ownership of their copyrights but grant Nyx Space broad rights as outlined in theContributor License Agreement (CLA).