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Chapter 1
What Did You Learn?
| Question | Answer |
|---|---|
| How did the development of more accurate methods of observing the heavens affect the acceptance of the heliocentric theory? | Galileo observed the heavens with the telescope he designed. |
| What is exemplary about Kepler’s life and work? . | He believed the theory should be made to fit the facts, not vice versa |
| Who wrote “The Revolutions” and why is it important? | Copernicus. A hundred years later his theory became accepted by most scientists. Although astronomers have changed some of its details, they still accept Copernicus’s model of the solar system and the model is called the heliocentric theory. |
| Explain why the earth’s tilt causes the seasons. | In the Northern Hemisphere’s summer, the North Pole tilts toward the sun. In the Northern Hemisphere’s winter, the North pole tilts away from the sun. |
| How does the Gregorian calendar differ from the Julian calendar? | He prevented future problems by leaving out three leap years every four centuries. |
| How does the Moslem calendar work? | Has twelve months, half the months have 29 days, and the other half have 30 days, for a total of 354 days to concentrate on the moon’s changes. |