Potential answers for "Radio wave pioneer"

⭐⭐⭐ ANTINODE
⭐⭐⭐ PULSARS
⭐⭐⭐ SHOCK
⭐⭐⭐ IONOSPHERE
⭐⭐⭐ ECHO
⭐⭐⭐ PULSAR
⭐⭐⭐ BOSE
⭐⭐⭐ QUASAR

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