In the path of Mars against the background stars shown in Figure 4-2 of Universe, 11th ed., the planet appears from Earth to move in a loop, moving westward for a period of time. What is the approximate angle between the Earth-Sun line and the Earth-Mars line when the planet is halfway through the westward, or retrograde, motion on about June 1?

Question

In the path of Mars against the background stars shown in Figure 4-2 of Universe, 11th ed., the planet appears from Earth to move in a loop, moving westward for a period of time. What is the approximate angle between the Earth-Sun line and the Earth-Mars line when the planet is halfway through the westward, or retrograde, motion on about June 1?
​
 ​

Quizplus · Accepted Answer

The Answer of In the path of Mars against the background stars shown in Figure 4-2 of Universe, 11th ed., the planet appears from Earth to move in a loop, moving westward for a period of time. What is the approximate angle between the Earth-Sun line and the Earth-Mars line when the planet is halfway through the westward, or retrograde, motion on about June 1?
​
 ​

In the Path of Mars Against the Background Stars Shown