Astronomers have discovered a ________ planet in the Kepler-47 system, – McqOptions

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1.	Astronomers have discovered a ________ planet in the Kepler-47 system, securing the system’s title as the most interesting of the binary-star worlds in April 2019.
A.	2nd
B.	3rd
C.	4th
D.	5th
E.	6th
Answer» C. 4th

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