Not as gravity lenses, but as both planets have atmospheres they can be used as refracting lenses at much shorter focal points at orbits, if using earth, just b

Not as gravity lenses, but as both planets have atmospheres they can be used as refracting lenses at much shorter focal points at orbits, if using earth, just beyond the moon. https://www.science20.com/tommaso_dorigo/the_terrascope_using_earth_as_a_lens-240567 https://www.science20.com/tommaso_dorigo/the_terrascope_usin...