  On the basis of an exact vacuum solution of Einstein's equations, {\it vis}.
the pencil-of-light field, we study the light-like motion of test and non-test
objects. We also consider the quantum theoretical interaction of massless
scalar particles through virtual gravitons. The dragging phenomenon is
manifested and its agreement with astronomical observations established.
  This paper submitted to {\bf arXiv} is a somewhat reedited copy of my article
dedicated to Dr. Ivar Piir in a volume published on the occasion of his 60th
birthday in 1989 in Tartu by the Estonian Academy of Sciences.
