I Was a Sputnik of the Sun

Я был спутником солнца

Also known as Ensimmäinen ihminen avaruuteen, A Nap bolygója voltam, Ya byl sputnikom solntsa, I Was a Satellite of the Sun

Soviet Scientist Petrovich pioneers the way to the Sun, but his spacecraft is never heard from again. Later, Andrew's laboratory investigates means of protection from deadly radiation. Andrew repeats Petrovich's journey, and offers his life to rescue an orbiting science laboratory, which holds the solution to the problem.