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Star

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  • What is the term for a star’s true brightness, regardless of distance?
    Absolute Magnitude
  • What color are the coolest stars?
    Red
  • What is the closest star to Earth?
    The Sun
  • Why does Rigel appear less bright than the Sun, even though it is actually brighter?
    Because it is farther from Earth
  • What is the diameter of the Sun?
    About 1.4 million kilometers
  • What is a star made of?
    Plasma
  • It refers to the amount of light that a star radiates
    Luminosity
  • What is the term for how bright a star appears from Earth?
    Apparent Magnitude
  • A red supergiant star with a diameter 830 times that of the Sun.
    Betelgeuse
  • What is the name of the closest star to the Sun?
    Proxima Centauri
  • What is the order of star colors from hottest to coolest
    Blue, White, Yellow, Orange, Red
  • What color are the hottest stars?
    Blue
  • How long does sunlight take to reach Earth?
    8 minutes and 20 seconds
  • A blue supergiant star in the constellation Orion
    Rigel
  • How many stars are in the Milky Way galaxy?
    Approximately 400 billion
  • What are two factors that affect the brightness of a star?
    Size and temperature
  • What type of star is the Sun?
    Yellow dwarf star
  • How old is our Sun?
    4.6 billion years old
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