![Illuminated human outline as viewed from Mars. Idea for communicating with inhabitants of Mars by illuminating a large area (several square miles) of snow the shape of a man with arc lamps. Illuminated human outline as viewed from Mars. Idea for communicating with inhabitants of Mars by illuminating a large area (several square miles) of snow the shape of a man with arc lamps.](https://c8.alamy.com/comp/MR3W8H/illuminated-human-outline-as-viewed-from-mars-idea-for-communicating-with-inhabitants-of-mars-by-illuminating-a-large-area-several-square-miles-of-snow-the-shape-of-a-man-with-arc-lamps-the-article-assumes-that-mars-is-inhabited-by-intelligent-beings-because-of-the-canals-and-since-we-can-see-diemos-and-phobos-through-our-telescopes-the-martian-astronomers-would-see-the-giant-figure-as-shown-dated-19th-century-MR3W8H.jpg)
Illuminated human outline as viewed from Mars. Idea for communicating with inhabitants of Mars by illuminating a large area (several square miles) of snow the shape of a man with arc lamps.
![Green Bank, West Virginia, USA: the only US national Radio Quiet Zone (by FCC 1958-now). Green Bank Telescope is world's largest fully steerable radio telescope. | portfolio.photoseek.com Green Bank, West Virginia, USA: the only US national Radio Quiet Zone (by FCC 1958-now). Green Bank Telescope is world's largest fully steerable radio telescope. | portfolio.photoseek.com](https://portfolio.photoseek.com/img-get/I0000Fc4df8pylMs/s/1200/I0000Fc4df8pylMs.jpg)
Green Bank, West Virginia, USA: the only US national Radio Quiet Zone (by FCC 1958-now). Green Bank Telescope is world's largest fully steerable radio telescope. | portfolio.photoseek.com
![Radio interference from satellites is threatening astronomy – a proposed zone for testing new technologies could head off the problem Radio interference from satellites is threatening astronomy – a proposed zone for testing new technologies could head off the problem](https://images.theconversation.com/files/513013/original/file-20230301-20-knf7oq.jpg?ixlib=rb-1.1.0&q=45&auto=format&w=1200&h=1200.0&fit=crop)