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In the Path of Mars Against the Background Stars Shown

Question 112

Multiple Choice

In the path of Mars against the background stars shown in Figure 2-2, the planet appears from Earth to move in a loop, moving westward for a period of time. In the 2012 loop, what is the angle between the Earth-Sun line and Earth-Mars line when the planet is halfway through the retrograde motion, in late February? In the path of Mars against the background stars shown in Figure 2-2, the planet appears from Earth to move in a loop, moving westward for a period of time. In the 2012 loop, what is the angle between the Earth-Sun line and Earth-Mars line when the planet is halfway through the retrograde motion, in late February? A) 180° B) It can be any angle. C) 0° D) 90°


A) 180°
B) It can be any angle.
C) 0°
D) 90°

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