Solairon 12 is a planet briefly "scanned" on the screensaver (no longer) made available on the official U.S. Metroid Prime web page by the AARMA (Angstrom Analogue Radio Mapping Array). It has no mention in any other Metroid media. Its name, "Solairon", likely refers to the sun.

Its mass is measured in "trillion teratons", a unit of measurement also used on the AARMA and in Prime to measure the mass of each planet in the FS-176 system, and the Armaged Pantheon.


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