Presentation on theme: "Evidence for the Earth Being Round Time Zones Position of Celestial Bodies Circumnavigation of the Earth Photos from Space Ships Sinking Below Horizon."— Presentation transcript:
Evidence for the Earth Being Round Time Zones Position of Celestial Bodies Circumnavigation of the Earth Photos from Space Ships Sinking Below Horizon Nature of Gravity Circumnavigate – to travel around No Evidence to the Contrary Comparison to other round astronomical Objects Shadow During Lunar Eclipse
Aristotle used the round shape of the Earth’s shadow during a lunar eclipse to argue for a round shaped Earth Why does the moon during a total lunar eclipse have a red cast? We will discuss this in three weeks.
Ships Sinking Below Horizon Ships sink below the horizon, but can still be viewed from higher elevations
Circumnavigation of the Earth Circumnavigate – to travel around Traveling in any single direction will eventually lead back to starting point
Time Zones Time varies by longitudinal position NSunNoon Sunset 6 pm Sunrise 6 am Midnight
Position of Celestial Bodies North Star Use the North Star as an example. Someone on the north pole looks straight up to see the north star, while someone in Richmond looks at an angle to see the north star. Where does someone in the southern hemisphere see the north star?
Shadows Cast by Sun on Earth
Photos From Space
Nature of Gravity Gravity pulls equally in all directions. This is why the earth is round.