Introduction: - Ask students what they know about stars - Explain that stars are massive, luminous spheres of plasma that emit light and heat - Mention that stars are the building blocks of galaxies and play a crucial role in the universe

Types of stars: - Explain that stars come in different sizes, colors, and temperatures - Mention that the classification of stars is based on their spectral type, which is determined by their surface temperature - Show a Hertzsprung-Russell diagram and explain how it helps astronomers classify stars - Discuss the main types of stars: red dwarfs, main sequence stars (like our sun), giants, and supergiants

Life cycle of stars: - Explain that stars are born from clouds of gas and dust called nebulae - Discuss the process of star formation, including the role of gravity and nuclear fusion - Show a diagram of the life cycle of a star, from birth to death - Explain that the fate of a star depends on its mass, with more massive stars having shorter lifetimes and more violent deaths

Observing stars: - Discuss the tools and techniques astronomers use to observe stars, including telescopes, spectroscopy, and photometry - Explain how astronomers can determine the distance, size, and composition of stars - Mention some of the important discoveries made through the study of stars, such as the existence of exoplanets and the expansion of the universe

Conclusion: - Summarize the main points of the lesson - Encourage students to continue learning about stars and the universe - Mention some resources they can use to explore these topics further, such as books, websites, and science museums.