Osis/Kakuna

Kakuna, also known as Osis B, is the primary star in the Osis star system. It is known to host 2 planets, with many more unconfirmed.

= Current status =

Kakuna is a main-sequence star less massive than the Sun, meaning it is currently fusing hydrogen into helium primarily through the P-P chain.

= Anomalies =

Kakuna, despite being only 3 gigayears old, seems to have less metal content than the Sun, which is around 4.5 gigayears old. This is abnormal, because typically the metal content in the universe slowly incrases with age; stars born younger should have more metals.

= Planets =

Osis B 1
Osis B 1 is a massive global ocean planet that has close to 3.3 times the mass of Earth.

Atmosphere
The atmosphere of Osis B 1 is breathable and non-toxic. The pressure is just above 0.7 Earth atmospheric pressures. Roughly 27.6% of the atmosphere is composed of oxygen, with the bulk of the remainder being neon and the rest being trace gases.

Osis B 2
Osis B 2 is a tundral planet that has about 1.23 times the mass of Earth.

Surface
The surface of Osis B 2 is almost entirely steppe and tundra: the cool temperatures don't allow for big plants like trees to grow.

Atmosphere
The atmosphere of Osis B 2 is breathable and non-toxic. The pressure is just under 2.4 Earth atmospheric pressures. Roughly 8.58% of the atmosphere is oxygen, with the remainder being mostly neon and other trace gases.