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Eagle was already 3 miles downrange from the expected position at the start of descent, due to residual pressure in the docking tunnel pushing the spacecraft apart when they undocked. Final touchdown was about 4 miles downrange from the intended landing site: 104:15:13 Duke: Roger. Understand. Omni Charlie. Mike, be advised we have an update for you on ...


The distance is noted in Apollo by the Numbers. 22,500 feet, that is 6.858 km or 3.7 nautical miles or 4.26 statute miles, not so far away. There are some different values to be found:


Use steam to decelerate and cool the payload. Using the payload to create a tough, hollow container, shaped to be stable on reentry. Fill it with water. Reentry friction heats the water to steam, the resulting high pressure steam is directed out of nozzles positioned to decelerate the payload to a survivable value for impact speed into a body of water. This ...


The answer by @RusselBorogove misses the key technical advancement that makes landing boosters possible which is why I am adding this answer. All the 'landing' examples given, amount to solving the inverted pendulum problem + guidance problem assuming no constraints on the control input. The problem is if you want to actually land an orbital class booster, ...

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