A Matter of Perspective

Jon had never felt so utterly alone, so isolated. Tears blurred his vision as the absoluteness of that isolation finally became real to him. His fiancee had broken it off two hands of periods ago, telling him there was no point in continuing. He had made his choices. He had accepted the mission. After all, he was their most senior astronaut and the honor they had plied him with had scrambled his logic. The world's greatest explorer. Savior of Illume. Kids named after him. Monuments, Generations of adulation and the stories of his exploits becoming mythical in time.

Of Course, during his faster than light travel, he would not age. But everyone in his life would be dust of the ages when he returned. A poor bargain for all that fame.
What would he find?

Was his the only perspective on the universe?