Why is it relatively difficult to observe details on the surface of Mercury from Earth?
A) The surface of Mercury is always completely covered in clouds.
B) The surface of Mercury appears very bright from reflected ultraviolet sunlight and emitted infrared radiation from its very hot surface.
C) Mercury is a small object that always appears close to the Sun in the sky.
D) Mercury's orbit always keeps it on the opposite side of the Sun from Earth.
Correct Answer:
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Q3: Mercury can be seen easily from Earth
Q4: The albedo, or fraction of light reflected
Q5: Mercury appears from spacecraft photographs to resemble
Q6: Mercury has a very
A) dim magnitude when
Q7: Mercury, unlike the Moon, has large crater-filled
Q9: The Mariner 10 spacecraft was placed in
Q10: Why is Mercury difficult to observe from
Q11: Which one of these features is common
Q12: How has the age of Mercury's intercrater
Q13: Mercury's orbit has a semimajor axis of
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