- Janusz Gil Institute of Astronomy [Góra, ul. Licealna 9, 65-417, Zielona Góra, Poland]
- Jean & Frasca Design
- Jet Propulsion Laboratory
- Jodrell Bank Centre for Astrophysics
- Johann-Friedrich Blumenbach Institut für Zoologie und Anthropologie
- Johann Radon Institute for Computational and Applied Mathematics