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The Life of a Star
Updated: 11/21/2019
The Life of a Star
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Storyboard Text

  • Great. Really great. How do you know all of this? Wow...
  • Right. What are blackbody radiators?
  • Then why are you working here?
  • I was good at science. I knew a lot about it and really liked it.
  • I don't know. Anyways, let's continue.
  • What's electromagnetic radiation?
  • What's an example and a non-example?
  • Ooh. Welp, this needs quite an explanation. So, blackbody radiation is heat, or thermal electromagnetic radiation, in or around a body with the same temperature as its environment, from an emitter in a blackbody.
  • Stars are an example, since they emit heat, and an non-example would be an LED light bulb, since it doesn't emit heat.
  • It's a kind of radiation from electromagnetic waves, which are like radio waves, microwaves, gamma rays, etc.
  • Wow. And what's a supernova?
  • Thanks. Bit random, but what's a black hole?
  • And what's a nebula?
  • A black hole is a area of spacetime with gravitational acceleration so strong that nothing, not even particles or light—can escape from it.
  • A supernova is a powerful and bright stellar explosion. It usually happens during the last stage of a massive star.
  • A nebula is a cloud of gas and dust in outer space.
  • Wait, that reminds me, what about the life cycle of a star? Didn't we need to go over that? Like, that was your homework?
  • Yeah. Forgot. Can we go over it now?
  • Sure.
  • What's next after an average star?
  • Well, it first gets formed by nebulae, where gravity pulls together clumps of nebulae until they get so big they collapse under their own gravity, creating a normal star. It's like adding more weight to something until it van't hold the weight anymore. For example, weight lifts.
  • Over time, the star wil cool and change color to become red giants. The step after that depends on the red giant's mass. Small stars, like the sun, will die, and go through a planetary nebula phase and become a white dwarf.
  • Last question, why do stars appear to be blue and red?
  • Well, I just have to say, thank you, thank you, thank you!
  • It all depends on temperature, really. The hotter the star, the more blue it is, while the cooler the star the redder it is.
  • You're welcome.
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