jm
Flat EarthL½It'd work if the sun was smallish and close to the earth. A few skype calls should solve that one for you. Call someone in your own hemisphere but very far away and someone in the opposite.
https://whatsonchain.com/tx/03de392bbc4bdd59bdbff3a69d25de98386b12ed50b94bb22f2b83e684ecbeaf