In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.

Sentence 1: I looked out my window and saw what I thought to be a star. Sentence 2: The dot of light was a funny color so I decided to investigate. Sentence 3: I got out my telescope from the garage and set it up. Sentence 4: When I pointed at the star I saw it for what it was. Sentence 5: The so-called star was really a comet.
The Star