Making a splash: while energy production for a city on the Moon may be achievable, water resources would likely eventually run out. (Courtesy: Shutterstock/Helen Field)

Some countries and even wealthy individuals are setting their sights on the Moon, with ambitious plans to create a lunar colony.

That would require a lot of resources launched from Earth, but how much water and power would be required to keep a lunar city going?

Astronomers Martin Elvis and Jonathan McDowell from the Smithsonian Astrophysical Observatory have now taken a look at the resources required for several population sizes .

When it comes to power, the pair think it should be possible to generate sufficient energy even for a large city and without the need for nuclear power.

They estimate it would be possible to generate 3 GW of electricity using kilometre-tall towers covered with photovoltaic arrays.…