Multiple Choice
Strong evidence for the existence of planetary systems in the process of formation around other stars comes from:
A) detection of very regular pulses of radio energy from some stars.
B) spectroscopic evidence of large quantities of molecules such as ammonia and methane, which can exist only in planetary atmospheres.
C) direct photography of actual planets near other stars.
D) periodic wobbling of the positions and spectral line displacements of several nearby stars.
Correct Answer:
Verified
Correct Answer:
Verified
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