Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Problem:Passage: We have a main sequence star nearby. Our Sun is on the main sequence, classified as a yellow dwarf. Our Sun has been a main sequence star for about 5 billion years. As a medium-sized star, it will continue to shine for about 5 billion more years. Most stars are on the main sequence. Answer: yellow dwarf
Solution:
Our sun is on the main sequence, like most stars, and it is classified by what colorful name?