What do astronomers mean when they say that the Sun makes energy by hydrogen burning?

Name: What do astronomers mean when they say that the Sun makes energy by hydrogen burning?
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When astronomers say that the Sun makes energy by hydrogen burning, they mean that the Sun is fusing hydrogen into helium in its core, a process known as nuclear fusion, and releasing a tremendous amount of energy in the process. This is the primary source of the Sun's energy output and the reason why it shines.

What Do Astronomers Mean When They Say That the Sun