Incidentally, since you were correcting the propulsion abilities, let's keep the media honest. The press is calling it a balloon, which, if your solar panel and rudder propulsion you mentioned is accurate, would make it by definition an airship and not a balloon.
There are two kinds of floating lighter-than-air or LTA craft: the balloon and the airship. A balloon is an unpowered LTA craft that can lift. An airship is a powered LTA craft that can lift and then maneuver in any direction against the wind.
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