The Main Sequence Again

Once it has matured and assumed its rightful place on the main sequence (see Chapter 17, "Of Giants and Dwarfs: Stepping Out into the Stars"), a star (regardless of its mass) enjoys a steady job. Indeed, it does only one thing in its incredibly hot core: fuses hydrogen into helium, producing great amounts of energy exactly as we described for the sun in Chapter 16, "Our Star." This core hydrogen burning keeps a star aliveā€”or, more precisely, maintains its equilibrium, the balance between the radiation pressure sustained by fusion pushing out and the force of gravity pulling in.

Telescopes Mastery

Telescopes Mastery

Through this ebook, you are going to learn what you will need to know all about the telescopes that can provide a fun and rewarding hobby for you and your family!

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