Around 18H30: Out of the bus, I raised my head to see the sunset and I saw the objet. Watch it around 25-30 seconde. It was slowly moving Est to West. It was more bigger that a commercial airplane, spherical, transparent and reflecting the sun ray at his surface. But, look totaly solid a bit like a Crystal ball! I down my head 3secs ( put my cap because the sun was blinding me) and when i look up again, it was disappeared. I search the sky in all directions without trace. I live in an high airplane trafic area since the airport is close. I saw many planes a day... To big to be a ballon or anything else... Can't explain it!