Walking to Aldebaran

Chilling story of a lost astronaut on an alien artefact, struggling to find his way home even as the world around him transforms his body and mind My name is Gary Rendell. I'm an astronaut. When they asked me as a kid what I wanted to be when I grew up, I said, "astronaut, please!" I dreamed astronaut, I worked astronaut, I studied astronaut. I got lucky; when a probe sent out to explore the Oort Cloud found a strange alien rock and an international team of scientists was put together to go and look at it, I made the draw. I got even luckier. When disaster hit and our team was split up, scattered through the endless cold tunnels, I somehow survived. Now I'm lost, and alone, and scared, and there's something horrible in here. Lucky me. Lucky, lucky, lucky.