Multiple Choice
During the 1860s,a hypothetical planet named Vulcan,in a solar orbit closer to the Sun than Mercury,was proposed as the cause of abnormalities in Mercury's orbit.Much of the 1860s and 1870s was spent studying the solar disk waiting for Vulcan to cross.Vulcan never appeared (but we learned a great deal about sunspots!) .This technique is like which exoplanet-discovery technique?
A) distorted protoplanetary disks
B) the transit method
C) the radial-velocity method
D) the astrometric method
Correct Answer:
Verified
Correct Answer:
Verified
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Q12: In order for an exoplanet to be
Q13: Exoplanets were first observed in:<br>A) 1810.<br>B) 1931.<br>C)
Q14: We have begun to observe exoplanets not
Q15: The largest exoplanet discovered thus far has
Q17: The age of the oldest extrasolar planet
Q18: It is believed that the stellar disk
Q19: What type of search technique has discovered
Q20: What is surprising about the extrasolar planets
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