How is the temperature of a star determined and what methods are used to measure it accurately?

Well, sweetie, the temperature of a star is determined by analyzing its spectrum, specifically looking at the intensity of different wavelengths of light emitted by the star. Astronomers use tools like spectroscopy to study the spectrum and calculate the temperature based on the peak intensity of light emitted by the star. It's not an exact science, but it's the best we've got to figure out how hot those fiery balls of gas really are.