Hi,

I will try to be as clear as I can. I saw on 20/09/09 around 20u35 in Rashaant(between Ulan Bataar en karaKorum) in Mongolia the following thing.
The sky was black, full of stars, in the west still little light of the sun.
then I saw south-east a white cloud appearing, moving direction west. Then it centrically widenend direction west, until it covered the whole south west atmosphere. In the beginning it was thick, but the stars could be seen through and the bigger it became the thinner it became, untill unvisible.
This took about one or two minutes or less. I have no foto.

Have you any idea what it was?

Thanks

simon

slimon:

a white cloud

Well, that maybe what it was. Even if it's not a typical cloud it could have been a cloud of sand or similar. (It is Mongolia afterall.) It may have been backlighted by the last of the Sun's light.

Otherwise, I'm at a loss.

Perhaps it was an upper rocket stage fuel dump or some sort of vapor release experiment.

Dave Mitsky

Simba?

 If there was a lion's face in the sky (Bar the Sickle.) I'd be impressed.