Chapter 2, Problem 5VSC

Use the following questions to check your understanding of some of the many types of visual information used in astronomy. For additional practice, try the Chapter 2 Visual Quiz at MasteringAstronomy®.

The figure above is a typical diagram used to describe Earth's seasons.

The figure above (based on Figure 2.14) shows the Sun’s path through the constellations of the zodiac.

5. Given that Earth's actual distance from the Sun varies by less than 3% over the course of a year, why does the diagram look so elliptical?

a. lf correctly shows that Earth is closest to the Sun at points A and C and farthest at points B and D.

b. The elliptical shape is an effect of perspective, since the diagram shows an almost edge-on view of a nearly circular orbit.

c. The shape of the diagram is meaningless and is done only for artistic effect.