The planet of Entropolia is located in the Milky Way Galaxy approximately 42 lightyears from Earth. It is orbiting within the Loomy System. Orbiting Loomy are three satellites Beko, Entropolia and Cabo.
Loomy is a 3 billion-year old type-F main sequence star. It is a sphere of mainly hydrogen and helium gases, about 1.6 million km wide. In its core, nuclear reactions convert mass into electromagnetic radiation, a form of energy. This energy radiates outward, making Loomy shine. It also warms the other objects within the system, which are held in orbit by Loomy's gravity. Its photosphere (out layer of gases) has a temperature of 6,500 K (6,226.85 C). Loomy has enough fuel to continue burning another 7 billion years or so. Loomy's mass is about one and one-half times the size of the Earth's Sun and it has a luminosity twice that of Earth's Sun. Its stellar mass is slightly more than the Earth's Sun.
Stellar mass: 1.25 solar masses Stellar luminosity: 2.0 Age: 3 billion years
Beko is the first planet in the Loomy system that is orbiting 7 million kilometers from the star. This is much closer than Mercury is to the Sun. Being so close to Loomy, Beko has a temperature of 1,000 C, just short of being red hot. It does not have an atmosphere. The planet is a molten ball of iron and rock. One side permanently faces Loomy. These conditions make the planet unsuitable for life.
Entropolia is the second planet in the Loomy system that is orbiting .96 Astronomical Units (AU) from Loomy. This is a little closer than Earth is to the Sun creating the surface temperature to be slightly higher at 28 degrees celsius. However this distance is still within the "Life Zone" allowing for water to exist. Even though Entropolia is in the "Life Zone" allowing for water to exist, that does not mean that it is suitable for life, other factors need to be considered.
The first factor is the atmosphere. Entropolia is a large enough planet to hold an envelope of gas around the planet by gravity. The atmosphere is a mixture of gases containing roughly 22% oxygen, 75 % nitrogen, 1 % argon and 2% other gases. Secondly, the air is breathable with an atmospheric pressure of .12 atm oxygen. This low atmospheric pressure indicates Entropolia is uninhabitable by humans however, suitable plants and animals would thrive. Thirdly, Entropolia has a low greenhouse effect keeping the temperature at around 21 degrees celsius. These planetary characteristics provide an environment conducive for life.
The climate of Entropolia is warmer and dryer than Earth. With a temperature of 28 degrees and being covered with 50% water, the planet is mostly desert. The orbital tilt is 15 degrees allowing for no ice at the poles and little seasonal variance throughout the year. Entropolia orbits around Loomy every 200 days with a day having 20 hours.
Cabo is the third planet in the Loomy system that is orbiting 42.1 AU from Loomy. Being so far from Loomy, this planet is very cold with a temperature of -90 degrees celsius, making it an ice ball. It does not have an atmospheric oxygen but rather frigid gases lethal to human, animal and plant life.
Photo credits: planets, galaxy = NASA