14

It’s an interesting idea, but the problem will be accuracy. Depending on the conditions found on the ground, it might be difficult to produce uniform “ammunition” and an “engine” with a sufficiently reproducible throw. The catcher would also have to be a substantial structure capable of dealing with significant wear. I would use a cable car / chairlift ...


11

I'm not sure if a thrower-catcher system is a good solution. Some points: Getting a canon (or launcher of any sort) to fire accurately across four kilometers without precision machined shots or a guidance system is going to be very, very difficult. Especially considering the lack of atmosphere which makes aerodynamic flight stability and control infeasible, ...


4

You could build a much safer, if less dramatic, system by transporting slugs of ice through 4.5 km of thin-wall flexible tubing in the manner of a pneumatic mail tube. If you have water ice, both hydrogen and oxygen are available through electrolysis to use as the working gas. Use whichever gas works better. If you can build such a system using two tubes -- ...


4

The design of the Gateway is still in flux, but here's an illustration from a couple of years ago showing it next to the ISS (lower right corner). Source (in Spanish) This image compares Mir and ISS Source Historic Spacecraft


2

The data needed to answer the question was collected by the Lunar Prospector Electron Reflectometer (ER). The data is then processed to derive the electrostatic potential, which is the same thing as the voltage. This article describes how the ER performs its measurements. http://www.tsgc.utexas.edu/spacecraft/lunar_prospector/er.html From the article: The ...


2

Wildly unrealistic for many reasons, but I'll just focus on the legal ones. First, as you say, the Moon Treaty is not widely ratified. Those countries that HAVE ratified the Agreement are of course subject to its provisions. But lets set that aside since here we are assuming that the countries in question aren't parties to the Moon Treaty. It is possible for ...


1

How big of a problem is the Lunar eclipse in April 2014 for LADEE? 8.5 years later, we know the answer. From Wikipedia's LADEE; End of mission: The probe then dealt with the April 2014 lunar eclipse on April 15, during which it could not generate power because it was in Earth's shadow for four hours. Science instruments were turned off and heaters were ...


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