SIDUS is released under the MIT License.
The canonical license text for tooling and package managers is the root file
LICENSE (no extension). This document explains scope and points
to related legal wording in the product.
| License | MIT |
| Copyright | © 2026 Massimo De Luisa |
| Commercial use | Allowed |
| Modification | Allowed |
| Distribution | Allowed |
| Private use | Allowed |
| Liability / warranty | None: software provided “as is” |
| Affiliation | None with NASA, ESA, SpaceX, Roscosmos, CNSA, JAXA, ISRO, ASI, DLR, CNES, KARI, AEB, or any other agency or company |
MIT License
Copyright (c) 2026 Massimo De Luisa
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
SIDUS calculators are educational pure-SI models. They are not flight-certified ephemerides, ECLSS design authority, or medical/flight rules.
Third-party names (NASA, ESA, ISS, Dragon, …) appear only for educational context and source citation. SIDUS is an independent open-source project.
Some snippets and tools use optional libraries (e.g. satellite.js for SGP4).
Those retain their own licenses; see package.json and snippet deps metadata
in src/lib/snippets/.
Contributions are accepted under the same MIT terms. See CONTRIBUTING.md.