Final answer:
Geodesic domes can span up to thousands of light-years and are known for their strength and ability to cover large spans. The Pantheon in Rome is an example of a geodesic dome.
Step-by-step explanation:
Geodesic domes can span up to thousands of light-years. The Gaia mission, once complete, will be able to measure distances of up to 1,200,000 light-years using geodesic techniques. These structures, made up of intersecting polygons, are known for their strength and ability to cover large spans without the need for internal supports. One example of a geodesic dome is the Pantheon in Rome, which features a massive unreinforced concrete dome.