be inspired by it to thank you and now let me introduce dan roni who is literally gone to the ends of the earth to collect some of the data that we've seen here today. thank you cool. thanks ship. so i hope it's. there you go. so the heart of our measurement is of course the each here a it would have been an expensive enormous undertaking to build a dedicated array just to do this experiment so we didn't do that instead we built an international partnership that allowed us to use some million telescopes all over the world in fact we used basically all of the sun moon or telescopes in the world to make this measurement one that none of them could have done on their own