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Europe's commercial launch stack had no domestic orbital-class entry point until Isar Aerospace put one there.
The German start-up completed what is being described as the first ever commercial blast-off from European soil, with its rocket reaching orbit. Reaching orbit is the hard constraint in any launch stack.
A vehicle must achieve and hold sufficient horizontal velocity to fall continuously around the Earth rather than return to it.
That condition places simultaneous demands on propulsion, staging, and guidance systems at a level a sub-orbital arc does not require.
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