Have astronomers detected any Earth-sized planets around normal stars yet?
A) Yes, the Kepler spacecraft is just starting to find them.
B) Yes, although the ones detected lie much closer to their stars than we do to ours.
C) Yes, although the ones detected lie much farther from their stars than we do from ours.
D) No, we do not have the technology to detect such low-mass planets yet.
E) No; although we have the technology to detect low-mass planets, we haven't found any others yet.
Correct Answer:
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