Acheron

Acheron was a planet that was orbited by the LV-345, a distant moon, which is located in the Zeta II Reticuli system, 39 light years from Earth.

Astronomical Data
The planet was a barren planet with a large system of mountains, deserts and valleys. The atmosphere was composed of nitrogen, oxygen, carbon dioxide and traces of argon and other gases. The air on Archeron was mostly identical to Earth's atmosphere, but contains a higher concentration of carbon dioxide making it toxic for humans to breathe outside.