Why?

In 1990, Voyager 1 took a photograph of Earth from 6 billion kilometres away. Carl Sagan reflected:
That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives ... on a mote of dust suspended in a sunbeam.
In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.
The case for solar thermal
Half of the world's energy consumption is related to heat. Among renewable technologies, solar collectors represent the most efficient environmentally-friendly method for harvesting heat energy.
We are developing direct solar-to-heat collection methods that are simple, inexpensive, and reliable. No intermediary conversion steps. No complex electronics. Just sunlight heating water.