Never heard of the lasers that can project light/images into the sodium layer? It's called a sodium layer laser guide star adaptive optics system. This system was created in 1997. ISS "launched" in 1998.. it's an artificial projected image into the sodium layer
Never heard of the lasers that can project light/images into the sodium layer? It's called a sodium layer laser guide star adaptive optics system. This system was created in 1997. ISS "launched" in 1998.. it's an artificial projected image into the sodium layer