The viability of solar energy is something that we can depend on for years and years to come. While humans can only aspire to live for a century at most, the sun has not shown any signs of waning any time soon. We can count on it for at least a billion more years for sure.
In fact, solar power is the only energy out there with no known notice of expiration. In comparison, fossil fuels have been dwindling in reserves. We don’t know exactly when these will run out. As for the wind, well, it comes and goes.
Even when the time comes that we become spacefaring creatures, we will still need to harness the power of sun to support our lifestyle. No doubt about it, unmanned spaceships are equipped with solar panels so they can keep chugging at space with no pollution intact. From the international space station to the futuristic designs of leading space tourism companies, solar panels have been well-integrated.