i was sitting on the sofa, and I saw a green light in the sky, by the windowI live in Metz, in Queuleu, not so far from the 'Centre Pompidou'it was dark nightfirst i thought it was a firework, but it wasn'ti observate the light going straight, and quite quickly in direction of Eastit was not a plane (no blinking), neither an helicopter or a military plane (absolutely no noise)there is usually no planes flying where I live and no military exercises, no fireworks apart during festsI posted a signal in Facebook to ask if someone else saw it. A friend told me that her neighbour posted a similar signal some minutes after mine. this person live in Remelfing, at the East of where I live. I decided to go outside on a higher spot in order to scan the sky, but no more light... it was very quick.I had a look at tweeter, someone saw something similar near Zurich, something like 10 minutes before i saw it...That was strange, I was not afrais, I'm usually "ovniphobic", but this light made me curious.Thank you ! hope my witness will be helpful :)