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We don't have enough medical data to decide if 0.1667 g is enough or too few. To get enough data we would need hundreds of humans living at 0.1667 g for some decades. But from what we know now it would be unhealthy to return to 1 g after years at 0.1667 g. We don't know if a lot of training would be sufficient to keep all bones of the body strong enough for ...


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From Why was the 100m Green Bank dish needed together with DSN's 70m Goldstone dish to detect Chandrayaan-1 in lunar orbit? above: "This computer-generated image depicts the Chandrayaan-1's location at time it was detected by the Goldstone Solar System radar on July 2, 2016. The 120-mile (200-kilometer) wide purple circle represents the width of ...


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Radar may be used with a transponder in the satellite. A special range measurement signal is send from Earth to the Moon satellite and echoed back by the transponder of the satellite. The round trip delay time may be measured with meters resolution and precision. This method was used for the Apollo mission. See How to get an initial setting of the range gate ...


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Any time there is a question about temperature in space I think it's worth saying a little about what that measurement even means. The temperature always has to be the temperature of something. Here on earth, when a weather report gives "the temperature", it's the temperature of the air. The temperature of the ground nearby can be higher or lower ...


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