I saw a flashing aircraft of some sort traveling very rapidly from west to east to the north of topeka ks.At approxamately 2100 hrs on 11-23 I was a passenger in a car. As we reached the top of a large hill I saw a white flashing object in the northern sky. It traveled from west to east rapidly over a four second time period approxamately. It covered the whole expanse of the sky in that time. The sky was overcast and I don't believe it was a shooting star. I'm a forty year old housewife and have never had an experience like that before.