What are the differences between stars and planets?

What are the differences between stars and planets?

Stars are massive celestial bodies that produce light and heat through nuclear fusion, while planets are smaller and do not generate their own light.

Can you explain how stars are formed?

Stars form from clouds of gas and dust in space, known as nebulae, which collapse under gravity to create a dense core that ignites nuclear fusion.

What about the composition of stars and planets?

Stars are primarily composed of hydrogen and helium, while planets can be made of various materials, including rock, metal, and gas.

Are there any exceptions to these definitions?

Yes, there are exceptions like brown dwarfs, which are not quite stars but have some characteristics of both stars and planets.

How do we classify different types of stars?

Stars are classified based on their temperature, size, and brightness, using a system that includes categories like O, B, A, F, G, K, and M.