1. Planetary Motion Early Astronomy
Challenge!
Planetary Motion
Early Astronomy

2. 1. Who am I? COPERNICUS PTOLEMY TYCHO BRAHE NEWTON GALILEO KEPLER
GEOCENTRIC MODEL
HELIOCENTRIC MODEL
GREAT OBSERVATIONS
ELLIPTICAL ORBITS
FIRST TELESCOPE
GRAVITY
PTOLEMY
COPERNICUS
TYCHO BRAHE
GALILEO
NEWTON
KEPLER

3. 2. How are the following measured?
One year
Ans: One revolution of Earth
One month
Ans: One revolution of the moon
One day
Ans: One rotation of the Earth

4. 3. What are the following dates?
Summer Solstice
June 21
Winter Solstice
December 21
The Equinoxes
September 21 and March 21

5. 4. Label the diagram below.

6. 5. What happens to day length as we move through summer?
The number of daylight hours DECREASES until the winter solstice.

7. 6. Discuss life at the North Pole in December.
The Sun does not set in the summer and therefore does not rise in the winter.

8. 7. What hemisphere has more extreme climate conditions in each season?
Probably the northern hemisphere because there is more ocean in the southern hemisphere to insulate and moderate temperatures.

9. 8. A kick-off time of 5pm in Seattle is a TV time of ___ here in Virginia.
8pm; Eastern places start the day earlier.

10. 9. How can you truly celebrate your birthday on two consecutive days?
Cross the
International
Date Line from
Asia to North
America.