Measuring the Universe
Thermometer
Armorial du Premier Empire
Huygens's Ring, Cassini's Division, and Saturn's Children
Maria Luisa Righini Bonelli, Albert van Helden. Divini and Campani
Galileo Project, Rice University
Theodore W. Ramm Family Bible Records
Invention of the Telescope
The Henry George Club, of Philadelphia
Glossary of Terms
The Invention of the Telescope
Huygens's Ring, Cassini's Division, and Saturn's Children
Christiaan Huygens
The Beginnings, from Lipperhey to Huygens and Cassini
Galileo and Scheiner on sunspots: A case study in the visual language of astronomy
Representing the heavens
Divini and Campani
Catalogue of Early Telescopes
Galileo on the sizes and distances of the planets