電でん波ぱ天てん文もん台だい

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Meanings

1

noun

radio astronomy observatory

A facility equipped with radio telescopes for observing celestial radio waves.

電electricity

波waves, billows, Poland

天heavens, sky, imperial

文sentence, literature, style

台pedestal, a stand, counter for machines and vehicles

電でん波ぱ望ぼう遠えん鏡きょう
Refers specifically to the radio telescope instrument, while 電波天文台 is the entire observatory facility.
天てん文もん台だい
A general astronomical observatory, which may include optical telescopes; 電波天文台 specifies radio astronomy.

Compound of 電波 (radio wave) + 天文台 (astronomical observatory).