Attach Specialized Research Modules (like Biotech or Energy) to the sides of these connector spokes rather than placing them at the very end.
If you observe high heat, try using the "S" or zigzag layout to increase the distance between modules, while ensuring they are still connected to the hub. Anno 2205 Orbital Station Layout
Focus your initial efforts on unlocking the Orbital Shielding , which allows you to block meteor showers on Earth. Attach Specialized Research Modules (like Biotech or Energy)