Mann's Planet

"Our Survival Instinct Is Our Single Greatest Source Of Inspiration."
Dr. Mann

Mann is an ice planet that orbits the black hole Gargantua. The planet is named after the first astronaut to land there named Dr. Mann.

No surface was ever found, in fact, the planet is honeycombed with seemingly endless layers of frozen ice-cloud crevices and mountains. He surmised this from the sublimating ice clouds, which, after a while, would totally evaporate. Therefore, the clouds must freeze and evaporate repeatedly, which Thorne believed could be caused by the eccentricity of Mann's orbit. The planet's gravity is 80% of Earth's gravity. It is so cold that even the clouds are frozen, giving the disconcerting view of vertical mountains. While the planet has water and an atmosphere, it is thick with ammonia, making it deadly to breathe. Probably surface atmosphere is able to breathe due to low altitude. The surface temperature is not cold enough to be fatal instantaneously during the day,, but is well below at least the freezing point of pure water of 32 degrees F (0 C) or at most the freezing point of pure ammonia of -108 degrees F (-77.8 C). Due to the presence of frozen clouds and the evaporation of carbon dioxide clouds, it seems possible or even probable that the sky is usually never seen from the solid ice.