Season Changes: Sun-Earth Demo
- Tim Brzezinski
Even though the Sun and Earth are not constructed to scale (nor is the distance between the centers of these two masses) , the Earth (shown here as northern hemisphere and southern hemisphere) does have an axis that is tilted approximately 23.5 degrees about its center with respect to the line that is perpendicular to the plane containing its orbit.
For the hemisphere in which you live, what Sun-Earth event does point A represent? What does point B represent? What about point C? What about point D? Give reasons for your responses.
TO EXPLORE IN AUGMENTED REALITY:
1) Open up GeoGebra 3D app on your device. 2) Go to the MENU (horizontal bars) in the upper left corner. Select OPEN. In the Search GeoGebra Resources input box, type jdkh6cz8 (Note this is the resource ID = last 8 digits of the URL for this resource.) 3) The buttons will not appear in the 3D app. However, the sliders SPIN and SPEED will. (Simply alter these and nothing else.)