Minshara Class

Minshara Class, often referred to as Class M is a planet who's atmosphere is primarily composed of nitrogen, carbon dioxide, and oxygen. Almost any Minshara Class planet can support life because of the large amount of water. There are usually no negatives associated with breathing their atmosphere.

Examples: Bajor, Betazed, Cardassia Prime, Earth, Ferenginar, Kronos, Romulus, and Vulcan.

Also see Planet Classes