What Causes the ‘Twilight’ of a Star?

Stars don’t just vanish, they glow out like a slowly fading lightbulb. When a star gets older, it runs out of fuel and starts to change shape. It becomes bigger and cooler, glowing more red, kind of like a sunset in space! This is called the ‘twilight’ phase because it’s like the star is saying goodbye before it dies.

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Examples

  1. A star becomes like a slowly glowing red lightbulb before it dies.
  2. The sun will one day become a red giant, and Earth might be swallowed by it.
  3. A star’s twilight is like the end of a long, warm day in space.

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