Using the space-time distortion caused by the sun‘s mass, the solar gravitational lensing effect may be enough to focus the interstellar transmission at the 500 AU mark, allowing interstellar communications to occur.
This may sound like science fiction, but as Hubble is proving, gravitational lensing is potentially a powerful tool with applications from black hole hunting to communicating with interstellar spacecraft.
Image (top): The distant light of a galaxy forms a ring due to the warping of the gravitational field of a galaxy in the foreground. Image (middle): The reconstruction of a magnified galaxy through gravitational lensing. Credits: NASA, ESA, J. Rigby (NASA Goddard Space Flight Center), K. Sharon (Kavli Institute for Cosmological Physics, University of Chicago), and M. Gladders and E. Wuyts (University of Chicago)