Trajectory means what it means. Look it up and we'll have the same understanding of it.

You're saying the trajectory is known, and I'm saying that in that case what you've been saying should be correct. Maybe if you fuckin relax and don't attack someone just because you don't understand what they're saying you'd not come off as such an asshole. Jesus Christ, Mr. Hothead.

An 900kg object going any number of kilometers per second won't be effected by windspeed for example.

Uh. Excuse me? How much do you think an aeroplane might weigh? 😆 Probably more than 900 kg. And the wind speed is probably not the issue. It would be the drag. 👌

So anyway. Let's relax in the next comment, shall we? Let's have a nice discussion from now on, no attacking. That would be cool, and adult.