Suppose That on a Certain Day Mercury and Venus Are

question 482

Multiple Choice

Suppose that on a certain day Mercury and Venus are both at greatest elongation in the western sky at sunset.After 584 days have elapsed,Venus again is at greatest elongation in the western sky at sunset.During this period,how many times has Mercury appeared at greatest elongation in the western sky at sunset? (Review synodic period in Section 2-3 and Table 2-1,Comins,Discovering the Essential Universe,6th ed.)

• A) once
• B) twice
• C) 3 times
• D) 5 times