Altair and Vega are far away from us! Altair 16 light years, Vega 27 light years. The distance between them is also very far, which is 16 light years. That is to say, the fastest light and electricity, from Altair to Vega, have to run nonstop 16 years, not to mention other means of transportation.
The distance between them is also very far, which is 16 light-years, that is to say, the fastest light and electricity, from Altair to Vega, will run continuously for 16 years. The meeting between the cowherd and the weaver girl only happens in mythology.