How did the invention of the telescope help modern science? Why is the distance to planetary nebulae important? How does astrophysics differ from cosmology? What general wavelengths did the Arecibo radio telescope observe? Why is X-ray astronomy done with telescopes in space? Why have astronomers...
require air, water, and food during shipment as people do, and so can take advantage of the great fuel savings. The minimal lunar settlement of people would occur after much low cost telerobotic or automatic and semi-autonomous work processes and infrastructure were completed. A small ...