How are stars distinguished by size and color?

The biggest stars are super giants. They are hundreds of times larger than the sun. Stars that are ten times larger than the Sun are called giants. The sun itself, like him, as well as smaller stars are called dwarfs.
By color, white, blue, yellow, red stars are distinguished. Our sun is considered a yellow dwarf. White dwarfs are very interesting – stars the size of our planet. The density of their substance is amazing. One teaspoon of the substance of such a star would weigh several tons on Earth.
The brightest stars emit 100 thousand times more heat and light than the Sun. But such stars are also known that shine a million times fainter than the Sun.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.