There are quite a few technical challenges here (weight of cables, stability at 20 mi, erosion by much intense radiation etc). Details on one of the previous ef

There are quite a few technical challenges here (weight of cables, stability at 20 mi, erosion by much intense radiation etc). Details on one of the previous efforts which was considered revolutionary but never became main stream can be seen here: http://www.spacedata.net/news040108.htm http://www.spacedata.net/news040108.htm.