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angled orbital mirrors to light up an area on request || ActInSpace Challenges


Think of an application for the solution in a region with insufficient sunlight, either due to its latitude or light/dark cycle.
Suggest new services made possible by the beaming of sunlight: heating, electricity generation, night work, etc.
The space mirrors can be positioned in low Earth orbit or geostationary orbit, with two different economic models. Conduct an analysis based on the degree of power produced.
Can you turn the light on please?
Present a marketing model of your innovative solution, with visual examples and a punchy message
Angled orbital mirrors to light up an area on request


Many of the Earth’s economic regions have insufficient sunlight, which may be either temporary (at night, for example, or due to fluctuating seasonal levels) or permanent, if there is not enough light to carry out operations such as exploration, mining activities, large-scale building project, etc. Mirrors positioned in low Earth or geostationary orbit can overcome this lack of light if they are angled in such a way as to light up a predetermined area. An initial experiment was conducted by the Russians in 1993 (Znamya), but did not achieve the expected results due to the mirror’s failed deployment mechanism. Since then, considerable progress has been made and we can now envisage very large mirrors (diameter of 1 km or more) launched at much lower cost than those of 25 years ago.


Try to imagine a range of applications for orbital mirrors capable of lighting up a predefined area on request.

The corresponding activities may involve a wide variety of fields, ranging from simple street lighting in cities during the winter months to electricity generators at local level or occasional assistance for specific projects such as mining or the building of infrastructure.

Constraints related to the launch phase (User Manual for current and future launchers) give us an accurate idea of the feasibility of getting such mirrors into orbit.

All that remains is to identify the vast scope of potential applications, and their related business plan, or - why not? - a series of simulations for the years to come!
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