Radio-telescopes (e.g. the Very Large Array (VLA)) can simulate one gigantic dish by using separate smaller dishes.
Q: Could such an array of optical telescopes potentially see an exoplanet at say 20 LY away?
- The array is space-based, at an ideal location such as the Earth-Sun L2 Lagrangian Point
- Assume the exoplanet of interest is defined as a rockey planet up to 5 times the diameter of earth