Why CANT you see the stars in space?

i dont get it if the man went on the moon why arnt there any stars in the back ground and i heard that the flag look like its moving because its actually been stretched and once something is stretched or moved in space it keeps moving in the same position like as if the wind is pushing it. but if things wobbles in space they should keep wobbling but then stop after coz how would a flag know how to move back and forwards