A partial eclipse from a sunshade in space sounds fun until the size and cost racks up. Even with lightweight materials and cheap launches and adding in Archina

A partial eclipse from a sunshade in space sounds fun until the size and cost racks up. Even with lightweight materials and cheap launches and adding in Archinaut-type construction, it's still totally gonzo money. And the orbit is non-trivial: to stay over (or near) one area it needs to be further away from the Earth so it has less shadow so it needs to be bigger... Aerosols need to be topped up.