In the Future, a Pair of Astronauts Are Sent on a Mission

question 28

Multiple Choice

In the future, a pair of astronauts are sent on a mission to the planet Mercury. They watch the Sun set one mercurian evening and decide they will go exploring in opposite directions and meet again the NEXT time the Sun is setting in the spot where they started. How long will they have to wait for the next sunset at that spot?

• A) one Mercury rotation period, 59 Earth days
• B) one Mercury year, 88 Earth days
• C) two Mercury rotation periods, 119 Earth days
• D) two Mercury years, 176 Earth days
• E) one Earth day

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