What is the difference between a star and a planet?
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Luminosity
The difference between a star and a planet lies, among other things, in the luminosity.
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The difference between a star and a planet lies, among other things, in the luminosity.
Stars emit light that is produced by nuclear fusion. They often have high temperatures and glow in different colors, depending on their temperature and composition. A star is a self-luminous astronomical object that produces energy through nuclear fusion of hydrogen to helium. Stars have a solid shape and are held together by their own gravity.
Planets do not emit their own light, but reflect the light of their central star. They have solid surfaces, although they can be made of different materials, including rock, gas or ice. A planet is a non-luminous object that orbits a star, has a round shape and has no fusion of hydrogen or helium in its interior.
