RT @HistAstro: Isaac Newton’s telescope in the Library of the @royalsociety; 1829 watercolor by William Henry Brooke @britishmuseum https://t.co/QhDY2asIrD
RT @HistAstro: Isaac Newton’s telescope in the Library of the @royalsociety; 1829 watercolor by William Henry Brooke @britishmuseum https://t.co/QhDY2asIrD