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SpaceX will try 'giant party balloon' to recover upper rocket stages

From Engadget - April 15, 2018

If such a system works out, it could provide more than a few benefits to SpaceX. As of 2018, SpaceX estimates a cost of $62 million to launch a Falcon 9 rocket with a first stage landing factored in. If it can reliably recover the upper stage with a relatively low-cost method like a balloon, it can both reduce its own expenses and make launches more attractive to customers. Throw in the eco-friendliness (there's no dead stage plummeting to Earth) and it could easily be worth attempting to use a balloon, however ludicrous the idea might sound at first blush.

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