Template:Selected anniversaries/July 23

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  • 1829: William Austin Burt patents the typographer, a precursor to the typewriter.

    1829: William Austin Burt patents the typographer, a precursor to the typewriter.

  • 1928: Astronomer and academic Vera Rubin born. She will discover the discrepancy between the predicted angular motion of galaxies and the observed motion, by studying galactic rotation curves.

    1928: Astronomer and academic Vera Rubin born. She will discover the discrepancy between the predicted angular motion of galaxies and the observed motion, by studying galactic rotation curves.

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