The plane is flying a contrary direction.

飞机正向相反的方向飞去。

youdao

And for each direction, I have a plane.

对于每个方向，都有一个平面。

youdao

And, to say that the motion actually stays in that plane forever means that this guy will not change direction.

那么说运动将永远保持在平面上，这意味着它的方向不会改变。

youdao

He chose an Australian man,Harold Gatty, to do the mathematics that decided the plane's direction.

VOA: special.2011.04.27

First, you'll have to schlep hand luggage on and off the plane multiple times in each direction.

BBC: Direct, nonstop, connecting?

He said it appeared the plane was going in the general direction of the airport, but not directly toward it.

CNN: 3 dead after plane crashes into Fla. house

Not that Boeing is publicly jumping on any scapegoats to wholly blame for the worldwide grounding of its 787 Dreamliners after the Federal Aviation Agency ( FAA ) issued an emergency airworthiness direction (AD) in response to a battery fire that forced an All Nippon Airways plane to make an emergency landing in Japan on January 16.

FORBES: The Dreamliner: Boeing's Big Brand Hangs in the Balance