All stars create energy in their core through a process called _____
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  • nuclear fission
  • nuclear fusion
  • thermal decomposition
  • chemical combustion
Most stars are made up of mostly two kinds of gases - _____
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  • hydrogen and helium
  • hydrogen and neon
  • oxygen and helium
  • oxygen and carbon dioxide
Astronomers sometimes refer to a star's true brightness as its _____
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  • brilliance
  • luminosity
  • shine factor
  • glossiness
This term means "how bright the star is, as if you were hovering right in front of it"
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  • true brightness
  • apparent brightness
  • accurate brightness
  • direct brightness
Which term refers to how bright a star appears to us, when observed from Earth?
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  • true brightness
  • apparent brightness
  • supposed brightness
  • likely brightness
How many Earths could fit inside the Sun?
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  • 200
  • 400
  • 400 thousand
  • more than a million
Which star is about 400 times bigger than the Sun, and 100,000 times more luminous?
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  • Polaris
  • Vega
  • Betelgeuse
  • Sirius
The Sun appears so big and bright to us on Earth because ______
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  • it's the biggest star
  • it's the hottest star
  • it's so close to us
  • it's the most luminous star
Which two factors influence a stars apparent brightness?
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  • luminosity and its distance from us
  • size and luminosity
  • mass and its distance from us
  • its mass and size
A star is a huge ball of hot gas that makes _____
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  • sound and light
  • heat and sound
  • heat and light
  • heat and colour
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