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JSA-Su D5

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  • What is the fastest moving thing in the universe?
    Light
  • How have telescopes changed over time?
    They have become more powerful and allow us to see things that are very far away.
  • What is the name for smaller stars?
    Dwarf stars
  • The writer says that stars look like...
    tiny diamonds fastened to a ceiling.
  • What is the Milky Way?
    A pale band of light we can see at night (or a galaxy)
  • What is the distance between the sun and Earth?
    150 million kilometers (93 million miles)
  • What is a light year?
    The distance it takes for light to travel in a year
  • When did scientists start using telecopes?
    In the 1600s
  • Look at the chart on page 444. Which is hotter, a young blue giant star or a red dwarf star?
    Young blue giant
  • How hot is the surface of the Sun?
    5,500 degrees Celsius (or 10,000 degrees Fahrenheit)
  • Is the Sun bigger or smaller than normal stars?
    Smaller
  • What do scientists call a pattern of stars?
    Constellations
  • Why do other stars look smaller than our Sun?
    They are much farther away from us than the Sun is.
  • What is our Sun called?
    A star
  • Why do scientists use a special unit to measure distance?
    Because distances in space are so big
  • Why can humans not travel to other stars?
    Because they are too far away
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