0 Members and 1 Guest are viewing this topic.
Alan Blake asked the Naked Scientists: Hi Guys I have a question related to the Earth's dwindling natural resources of energy... I understand that when the Earth revolves around the Sun in its orbit it absorbs less than 1% of all the energy emanating from the Sun. So more than 99.9% of the Sun's energy - as far as the Earth is concerned - is "wasted". Bearing in mind that the Sun is the ultimate source of all our energy sources then this is a great source of energy going to waste - which if harnessed could presumably supply all the Earth's energy needs. Obviously we need to find cheap and easy ways of capturing and using the energy already received from the Sun - but why are we not also capturing more of the Sun's energy which is passing us by? For instance - we are sending space craft up into orbit all the time circling the Earth - why cant we send up mirrors that could direct the suns rays to receptors on the Earth - or place many mirrors on the surface of the Moon which could trap the Sun's energy and redirect them to receptors on Earth. Surely this "free" energy from the Sun which is currently wasted could be sufficient to solve the worlds dwindling gas and oil supplies - without any harmful effects? Alan Blake What do you think?
Why not use the "Space Elevator" as conceived by Yuri Artsutanov, Arthur C Clarke in "Fountains of Paradise", and others, to carry the energy back to earth via cables, rather than a microwave transmitter?
Transmitters would need to be very carefully controlled directionally, and may produce a dangerous situation if control was lost.