i was with a friend unloathing some stuf in my garage, the sky was cloud free perfect suny blue sky, i'm noticing what a beautifull day it was, and then i see this white sphere going fluidly throug the sky at aprox. 1000m high. it didn't change course, it just whent on the same direction, but in a way a plane couldn't go, just so fluid...it did'nt whent very fast but clearly faster then a plane, i saw one in the sky at the same time that the sphere and the phere was much faster. then it desapeer behind my buiding.i went around but it waas gone. i told my friend to look at it while i saw it but he couldn't see it because the sky was too brigh. i know what i saw, believe it or not. just wanted to share this. thank you for your time.