post_install() {
	echo
	echo "The trajectory included in this Addon is valid only for the Julian dates"
	echo "Beginning 2452876.772222222 # 12aug03"
	echo "Ending 2455195.795793577 # 17dec09"
	echo "You must set Celestia's date to some time between those dates in order to see the spacecraft. "
	echo
}