  The Solar Gravitational Lens (SGL) is a gift of nature that Humanity is now
ready to exploit. SGL physics started with Einstein's 1936 paper on the
gravitational lensing; it was not until 1979 that the idea of a space mission
reaching the Sun's nearest focal sphere at 550 Astronomical Units (AU) was put
forward by Von Eshleman. By the year 2000, the senior author of this paper (CM)
had submitted a relevant formal proposal to ESA about the relevant space
mission to 550 AU. He presented his ideas at NASA-JPL for the first time on
August 18. In 2020 NASA awarded a $2million grant to JPL to prepare for the
first FOCAL space mission. But radio bridges between the Sun and any nearby
star may also be conceived. The idea is that, if Humanity will be able to send
unmanned space probes to the nearest stars in the future, each of these probes
could be placed behind the star of arrival and along the star-Sun line, thus
allowing for TWO gravitational lenses to work together. That will result in a
permanent communication system with much REDUCED POWERS to keep the radio link
between the two stellar systems: a veritable Galactic Internet. In this paper,
we study for the first time the 50 radio bridges between the Sun and each of
the nearest 100 stars in the Galaxy. Of course, this work is for the centuries
to come. But knowing which natural radio bridge between the Sun and each of the
nearest 50 stars is MORE CONVENIENT, will open the ROAD MAP for the HUMAN
EXPANSION into the Galaxy.
