To avoid this debris, why is it not possible to escape/travel in a vertical plane ...
We may not be as advanced as Alpha Centaurians; of course we take off vertically -- if we take off horizontally on a, basically, round planet we'll just be another SST shuttle going in circles around it!
::) ::)

8-)
...you are getting me all confused...

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Nah...
If Space Debris, etc, rotates in a thin horizontal plane around the Earth; and the Asteroid Belt, etc, rotates in a thin horizontal plane around the Sun...
Why try and navigate straight through the middle of it?....

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Why not just dip over the top of it, or underneath it, to avoid dangerous/lethal collisions... ::)...
Similar to what I do on my trusty Motor-Bike...
I just detour
around the bloody Traffic Jams!... :-*...!
There are a number of Detour Signs between Alpha Centauri and Earth, and I take full advantage if them, avoiding both Traffic Jams and paint damage to my fairings with bits of rock...

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The only real problems I have, are with the Inter-Stellar Highway Space Police...
They really don't like Motor Bikes...

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I don't know why. In Space they cant hear the noise from my after-market exhaust system!...

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Paul... 8-)...!
P.S. By the way...There's a really nice Transport Caff on Charon...(take Highway 42 from Pluto)...Toasted Bacon Sarnies a specialty!....

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