Answer:
The "I" refers to the storyteller who is Professor Trilokeshwar Shonku.
Step-by-step explanation:
This question is about the book "The Diary of a Space Traveler and other Stories" which features a narration with a first-person point of view. That person is Professor Trilokeswar Shounk who wrote the book to tell his experiences and moments during a series of space travels he made. In this case, the teacher is referring to himself when he uses the pronoun "I" in the narration.