This is part of my new undertaking I'm calling "Expedition Freyja". The basic goal is to create a planet with a biosphere and fill it with life. I plan on being as scientific as possible concerning the probability of these creatures existing. The creatures will be described as if they had been discovered and studied by humans, complete with scientific names, height, length, weight, habitat(shown on small map), behavior, and diet. Also included will be a short summary on what inspired me to create the creature.
Air: Nitrogen 54%, Oxygen 30%, Carbon Dioxide 14%, 2% (helium, hydrogen sulfide, methane, and water vapor)
Diameter: 6130 miles (roughly 2/3 earth)
Mass: 0.70 earth
Gravity: 0.75 earth
Day: 26 earth hours (though because of the 2 suns, night isn't completely dark for half of the year)
Year: 458 earth days
Climate: Similar to Cretaceous earth
Atmospheric density: 1.1 earth
Surface Pressure: same as earth
# of Satellites: 2
Freyja is the fourth planet of a binary star solar system. It is in the Goldilocks Zone of it's parent star, meaning liquid water is possible on the planet's surface. Put in our solar system, Freyja would be about halfway between the Earth and Mars. Despite being further from it's sun than earth, the climate is comparable to late Cretaceous earth (warmer than present day earth) thanks to the higher levels of carbon dioxide and oxygen . The atmosphere is about 10% denser than the atmosphere on earth and is poisonous to humans. On Freyja storms are stronger than on Earth thanks to greenhouse gases and two suns.
Freyja has complex life on it's surface, ocean, and in it's skies. Flying creatures take advantage of of low gravity and high air density, allowing them to grow larger and still fly. Terrestrial creatures can grow larger as well. There are no sentient lifeforms on Freyja. In its atmosphere, there are thick living clouds of air plankton (green clouds). (You've probably noticed that i haven't said plant or animal. That is because many of the creatures i have in mind combine animal and plant characteristics.)
Freyja has two moons. Bygul is 2/3 the size of earth's moon (making the proportions for Freyja and Bygul the same as Earth and its moon). Trjegul (the one with the crater is 1/2 the size of earth's moon.
Freyja is named after the Norse goddess of the same name. It's two moons are named after Freyja's cats that pull her chariot.