Yes, they do.
Here is some interesting stuff --
1. Developing a Giant Space Mirror. Scientists have figured out how to make mirrors that are so light that it should be possible to put colossal telescopes in orbit that will dwarf the Hubble Space Telescope. But instead of facing out, these mirrors would face in, looking at the Earth instead of into space.
2. Russia 1990s - We know now that this can work and we can build larger mirrors in space," Mr. Sevastyanov, the engineer, said through a translator in a telephone interview. The next step, he said, is building a large mirror -- perhaps 650 feet in diameter -- with a better reflector surface and a guidance system to focus its light at a fixed point.