Tenebris is the second closest planet to Alpha Centauri A and also the biggest planet in the solar system around Alpha Centauri A. The planet is the type astronomers would call a gas giant. Tenebris' outer layers are mainly made of gas such as hydrogen and helium - though it differs a bit from the gas giants we know from our own solar system: Jupiter and Saturn. Like Neptune and Uranus, Tenebris is classified at times as an ice giant as its atmosphere contains "ice" made of Water, Ammonia and Methane.
The surfaceTenebris has a complex structured atmosphere made of thick clouds that to the naked eye looks icy blue. It is believed to have clouds made of mostly water close to the surface - as it is heavier than some of the other gasses found in its atmosphere. The uppermost layers contain clouds of methane which gives the planet its blue colour. The centre around the core of the planet is compressed ices and rocks and is extremely compact. Giant storms form in the thick clouds because of the fast rotation the planet has - some storms might even have been there for decades - as the inner core of the planet rotates the outer light layers tries to keep up. Intricate swirls and patterns form on the surface, and storms can be seen from afar. Lightning in the uppermost layers has also been spotted frequently, which suggest variations in electrical charges in the air. At times, white streaks can be seen at the equator as some of the ice from lower layers gets up to the outer layers.
OrbitA full rotation on Tenebris is quite short at 14.56 hours which makes surface conditions something spectacular as described above.
Surface Gravity0.886 g (0.886 times the gravity felt on Earth)
Average surface temperatureThe outer layers: -12.4 Celsius (260.75 kelvin) The inner layers -57.1 Celsius (216.05 kelvin)
Days (Lenght)One day on Tenebris is 14.56 hours on Earth.
Orbit168.12 Earth days 277.12 Tenebris days
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