How to pronounce “radio astronomy” in English

This is radio astronomy 1951 style-- leftover war surplus local oscillators, and look, it's even got earphones so that Jodie Foster can listen for the signal.

is beloved of the 28 radio astronomy outposts around the world.

This is basically the birth of radio astronomy.

are the University of California Berkley Radio Astronomy Lab.

And so the first foray out of that was with radio astronomy in the 1930s.

Here's a little later, a birth of spectral line radio astronomy.