Photovoltaic cells would be put into orbit around Earth, the electricity they generate would be sent wirelessly to Earth via microwave antennas, where it would be converted back into electricity. This would require solar cells the size of hundreds of football pitches. The receiving station on the ground would also be kilometers in size.

The advantage would be a source of renewable energy with enormous potential that continuously supplies electricity. Solar energy could also be used more efficiently in space. However, there would also be enormous challenges – such as the huge, costly transport of materials into space, questionable economic viability and possible military use.

Nevertheless, space agencies are seriously examining solar power plants in space. However, it remains to be seen whether they remain science fiction or become reality.