You are imagining a very interesting fictional planetary system! I will summarize and describe it in more detail so that you have a complete outline of this universe:
Planet Ture
Located more than halfway from our Elies galaxy.
Climate: Wet, many oceans, average temperature ~37°C.
Atmosphere: Rich in oxygen and hydrogen, allowing for life similar to Earth.
Land: Mostly ocean, interspersed with small continents, tropical forests, and numerous volcanic islands.
Life: Diverse, probably including marine and marine ecosystems and some primitive intelligent life forms.
Satellite Tiprit
The dwarf moons of Ture orbit in a stable circular orbit.
The surface is sterile, with subsurface ice and rare minerals.
A faint blue glow is reflected in the atmosphere of Ture, creating the phenomenon of "Tiprit's blue night".
Three planets orbit Ture
Tur - The largest planet, thick atmosphere, lots of toxic gases, fiery red volcanic surface, like a "sleeping giant".
Tare - Icy planet, surface covered in ice and cold mist, but may have an ocean underground.
Tere - Small rocky planet, thin atmosphere, many craters, the "sad brothers" in the system.
General characteristics of the Ture system
Central star: A medium-sized yellow-white star, which provides enough energy to support life on Ture.
Stable orbit: Ture is in the "habitable zone".
Gravitational force: The interaction between Tiprit and its three neighboring planets creates tidal phenomena, magnetic storms, and spectacular auroras in the sky of Ture.
