What does radio astronomy study?

Correct answer: Astronomical objects at radio frequencies

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What people think about it: 3 Comments
corcaigher
corcaigher
Two answers apply.
Mikki Irish
Mikki Irish
Hercules140, They are not used to study radio signals. They use radio signals to study celestial objects. Only one correct answer.
quicksilver
quicksilver
Hercules140, no, because they wanted a specific use for radio signals