In this artificial galaxy, there is a trinary of quasar stars at the center, each one 1.5 trillion times as massive and 995 trillion times as bright as our sun, each one having its own ring of mirrors, which further raises the luminosity.
Far outside the quasars, there is a quaternary solar system. The first binary is a pair of artificially immortal blue hypergiants, each one 200 times as massive and over six million times as bright as our sun, each one having its own ring of mirrors, which further raises the luminosity. Orbiting the first binary from a distance of three-and-a-half parsecs (over 11 light-years) is the other binary, a pair of artificially immortal red supergiants, each one 17 times as massive, 1500 times as wide and 300,000 times as bright as our sun, each one having its own ring of mirrors, which further raises the luminosity.
The red supergiant binary has a habitable zone from 400 to 800 AUs away. There are plenty of Earth-like planets within this HZ, and they share the following characteristics:
- Axial tilt: Varying from 19.01 to 28.28 degrees on a cycle exceeding 200,000 years
- Atmosphere: While some would have an atmosphere of 300 degrees, as thick as Earth's, others would have the average of 370 miles, and maximum thickness would be 480 miles (160% as thick as Earth's)
- Size: Identical to Earth
- Rotation: 30 hours, which means three extra hours of daylight followed by three extra hours of night
The axial tilt suggests that all of the habitable worlds have seasons, but in this system, there is a second definition of "season", and that is because orbiting a supergiant binary orbiting a hypergiant binary affects the planet's orbital shape. In short, it elongates the orbit until it resembles a cucumber. "Summer" is where the quasar ternary and the blue hypergiant binary dominate the sky during the day and the red supergiant binary are the "second" and "third moon", each one being 250 times brighter than a full moon. "Winter" is where the red supergiant binary dominates the sky during the day and the other five stars are dimmed down to as much as 250 times as bright as Venus.
None of the planets in the red supergiant binary HZ have any life, not even microbial, so it seemed feasible to seed them with Earth species of plant, animal, fungi, microbe and even soil. But is it really? With the information provided above, would the seasons of these habitable worlds be too extreme for Earth life to thrive in?