Hey Mike==If your car has A/C when it is exceptionally humid outside, it is common for the vents to blow some vapor. It is generally more visible when the sun is shining inside the car. Nothing wrong. GoodluckJoe
It should blow through the floor vents. Modern vehicles generally use movable baffles in there HVAC systems, to direct air flow where the controls indicate. If the controls allow airflow to the floor, but nothing flows out, there is a malfunction between the control switch and the actuator that directs the flow.
The Sun can not reveal a constellation that it is transiting through. If the Sun is actually in Taurus, this would be during the day time and the constellation would not be visible. At night the Sun is on the opposite side of the zodiac so the opposite sign (Scorpio) would be visible in the night sky.