Click to learn more about stars
A main sequence star has reached an equilibrium where they produce enough energy through nuclear fusion to balance out push against gravity and hold up its outer shell. Nuclear fusion happens inside of all stars in the sky. Nuclear fusion turns hydrogen atoms into helium atoms. Polaris has reached an equilibrium and will maintain it for many millions of years.
 Click to learn more about the H-R Diagram
The picture above is the Hertzsprung-Russel diagram. It shows the varying temperature and brightness of different stars of different types. Our star "Polaris" is an F-Class Supergiant. It is similar to other stars such as Canopus and Arcturus. The H-R diagram is a tool used by astronomers to classify stars by their luminosity (brightness), color, temperature, and evolutionary stage.
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 Click to learn more about the North Star
The star Polaris is also known as the North Star, it has been a guiding light to travelers for many years since 1929 when it was discovered. Polaris is much like all the other stars in space. It has a core which is made up of mostly hydrogen and helium atoms. And has an outer edge which get pushed outwards by the energy nuclear fusion within the star creates, and is also pulled inwards by the gravity of the core.
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