Here's a breakdown:
Stars:
* Produce their own light and heat: Stars generate energy through nuclear fusion, where hydrogen atoms fuse together to form helium, releasing immense amounts of energy. This process is what makes them shine.
* Massive and dense: Stars are significantly larger and denser than planets, containing much more mass.
* Composed primarily of hydrogen and helium: These elements fuel the fusion process.
Planets:
* Reflect light and heat: Planets do not produce their own energy but instead reflect light and heat from a star.
* Smaller and less dense: Planets are much smaller and less dense than stars.
* Composed of various materials: Planets are made up of a variety of materials, including rock, ice, and gas, depending on their location and formation process.
In summary: The Sun is a star because it generates its own energy through nuclear fusion, while planets are celestial bodies that orbit stars and reflect their light.