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eclipse--to hide or to block




                               3
Early Tools to understand the sky

astrolabe--measures angles to predict patterns in the sky




                         ...
Sextant--also measures angles between the horizon and the stars




                                                      ...
Galileo--the first astronomer to use a telescope (did not invent the telescope)


           discoveries:
           *moon...
Stars
    *stars are made up of hydrogen and helium
    *these two gases react to give off thermal and kinetic energy
    ...
Types of Stars/Life Cycle of a Star

*nebula--cloud of dust and gas
*protostar--gets smaller and warmer                   ...
Characteristics of a Star

  Color: tells us the temperature
         red--cooler in temperature




        blue-white--h...
Our Star, the Sun
--big ball of hot gasses (hydrogen and helium)
--prominences--loops and fountains of blazing gas
--sun s...
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Chapter 16 notes

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Chapter 16 notes

  1. 1. 1
  2. 2. 2
  3. 3. eclipse--to hide or to block 3
  4. 4. Early Tools to understand the sky astrolabe--measures angles to predict patterns in the sky 4
  5. 5. Sextant--also measures angles between the horizon and the stars 5
  6. 6. Galileo--the first astronomer to use a telescope (did not invent the telescope) discoveries: *moon has mountains *Sun spins/rotates *Venus has phases like the moon *Jupiter has four moons that orbit around it *Earth and all the planets revolve around the Sun!* Isaac Newton--developed the reflecting telescope used a curved mirror to allow people to see things far away 6
  7. 7. Stars *stars are made up of hydrogen and helium *these two gases react to give off thermal and kinetic energy (light and heat) * 7
  8. 8. Types of Stars/Life Cycle of a Star *nebula--cloud of dust and gas *protostar--gets smaller and warmer black dwarf *main sequence star--gets smaller and warmer *red giant--gets bigger and cooler *variable stage--stars do different things here white dwarf *supernova--giant explosion *neutron star--cluster of neutrons about 12 miles across *black hole--a point in space that has gravity that pulls in everything, even light 8
  9. 9. Characteristics of a Star Color: tells us the temperature red--cooler in temperature blue-white--hottest 9
  10. 10. Our Star, the Sun --big ball of hot gasses (hydrogen and helium) --prominences--loops and fountains of blazing gas --sun spots--darker in color; cooler than other areas of the sun 3 layers photosphere--innermost layer chromosphere--layer in between corona--outermost layer 10

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