File:Ammoniaplanet.jpg

English: Ammonia planet is an assumed class of planet with surface covered in lakes or oceans of ammonia with ammonia clouds in the atmosphere.Ammonia planets tend to have similar climates to Earth's, except it uses ammonia as a "variable gas" instead of water vapor as it is on Earth. For example, there are ammonia rain or ammonia snow instead of water rain or water snow. Those planets tend to be very cold, at around−150°F (−115°C), or warmer depending on the thickness of the atmosphere. Their atmospheres tend to be composed mostly of nitrogen and oxygen with variable amounts of ammonia and trace amounts of carbon dioxide and other gases.The life-bearing potential of ammonia planets is considered fair. These unique worlds may harbor intriguing life forms that have adapted to extreme cold and employ ammonia as their primary solvent, contrasting with Earth's life that relies on water as its solvent. Some of the plants on ammonia planet may use photosynthesis using light from the parent star while others perform chemosynthesis. It is predicted that plants may use ammonia and carbon dioxide to produce methylamine, nitrogen, and oxygen.It is also predicted that lifeforms similar to animals might inhale oxygen and exhale carbon dioxide for respiration, just like animals here on Earth. Animals also may eat foods rich in amines and drink liquid ammonia. The main biogeochemical cycle on ammonia planets is the ammonia cycle compared to the carbon cycle here on Earth.However, life on some ammonia planets may not be carbon-based, but silicon-based as they have better survivability to extreme cold than carbon-based life.