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The term **Athena** has more than one use in astronomy:

- A magnetohydrodynamics (MHD) code developed at Princeton University.
- A code for second-order correlation functions (N-point functions), e.g., to analyze observed galaxy distributions in search of instances of gravitational lensing.
- A planned ESA X-ray-telescope space mission aimed at a 2028 launch (
**ATHENA**, for**Advanced Telescope for High Energy Astrophysics**).

https://arxiv.org/abs/0804.0402

https://princetonuniversity.github.io/Athena-Cversion

http://www.cosmostat.org/software/athena