What is the major difference between Mariner 10 and MESSENGER?
A) Mariner 10 flew past Mercury several times. MESSENGER went into orbit around the planet.
B) MESSENGER made a soft landing on Mercury, but Mariner 10 only flew by.
C) The two spacecraft were essentially identical, except that Mariner 10 landed on the daylight side of the planet and MESSENGER landed on the night side.
D) Mariner 10 was a failed mission. It crashed into Mercury. MESSENGER conducted a successful flyby.
Correct Answer:
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Q30: The Caloris Basin, a huge circular region
Q31: When were most of the existing lava
Q32: The density of Mercury is about the
Q33: The Caloris Basin is an immense impact
Q34: Mercury's iron core takes up approximately what
Q36: How do astronomers know that the Caloris
Q37: The history of Mercury can be summarized
Q38: The impact that formed the Caloris Basin
Q39: What is the Caloris Basin?
A) lunar mare,
Q40: Where in the solar system would one
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