I have already written quite
a lot about solar energy and the different new possibilities and
materials. In May the Japan Aerospace Exploration Agency (JAXA) has
announced that their goal was to build a solar power satellite that
would generate as much energy as an ordinary nuclear power station
does. This solar power station would then orbit the earth and would
collect solar energy 24 hours a day because of two huge mirrors to
get the sun at every angle. They say that this could be achieved
within 25 years. While there are clearly some issues still to be
addressed, they have managed to solve the main problems like wireless
power transmission over such a long distance. The current solution to
this specific issue are microwaves because they do not get blocked by
the atmosphere and because the power conversion into electric energy
from microwaves is already very efficient. For Japan this is a
logical step because the country has no fossil fuels to exploit,
space for renewable energy is scarce and because of the accident of
Fukushima nuclear energy does not seem to be the right solution
anymore. The plan is very ambitious and there still has to be more
research done, for example in the field of possible materials, but if
Japan succeeds in doing this, many science fiction movies would come
to life.
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