In the 1930s peer-reviewed science increasingly revealed that solid (metal atom-oriented) planets like Earth actually represented a blindingly small slice of one percent of even the visible Universe, a visible universe that mostly consisted of tiny bits of non-solid non metallic vapourware (plasma gas).
But at the exact same moment in time, popular science and technology media culture was at its apogee of exalting all the biggest, fastest, tallest etc examples of the (solid) (metallic) Man-made world.
And the public couldn't get enough of it.
Coincidence ?