It's completely doable, it just takes some multi-government commitment. A fleet of solar sails would be the cheapest and fastest, for example, it can accomplis

It's completely doable, it just takes some multi-government commitment. A fleet of solar sails would be the cheapest and fastest, for example, it can accomplish this with great redundancy, whilst being steerable and powered using the very sun they'll block. The size of the sails would have to be huge, so a very interesting engineering problem to be solved.