"Throughout the recent winter of nineteen seventy-three and -four the world press has been greatly exercised by the mysterious disappearance and reappearance of the spacecraft Troika-7. As everyone knows, the two-week interval between the spacecraft's disappearance on the morning of its launching on December 10 and its sudden reappearane on the evening of December 24 has been filled by the most contradictory accounts of the revolutionary craft's behavior. Some said that its astonishing speed--rumored to be greater than the speed of light--had taken it beyond the range of the tracking instruments before they had been able to be trained..."
Three astronauts share the story of their visit to earth, 100 years in the future, with a science journalist.