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Refracting telescope
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A refracting telescope is a type of optical telescope that uses a lens as its objective to form an image. The refracting telescope design was originally used in spyglasses and astronomical telescopes
A 200 mm diameter refracting telescope at the Poznań Observatory
A 200 mm diameter refracting telescope at the Poznań Observatory
Engraved illustration of a 46 m (150 ft) focal length Keplerian astronomical refracting telescope built by Johannes Hevelius.
Engraved illustration of a 46 m (150 ft) focal length Keplerian astronomical refracting telescope built by Johannes Hevelius.
Alvan Clark polishes the big Yerkes achromatic objective lens, over 1 meter (100 cm) across (1896).
Alvan Clark polishes the big Yerkes achromatic objective lens, over 1 meter (100 cm) across (1896).
This 12-inch (30 cm) refractor is mounted in a dome on a mount that matches the Earth's rotation.
This 12-inch (30 cm) refractor is mounted in a dome on a mount that matches the Earth's rotation.
Galileo Galilei
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Galileo di Vincenzo Bonaiuti de' Galilei, commonly referred to as Galileo Galilei or mononymously as Galileo, was an Italian astronomer, physicist, engineer and polymath. He was born in Pisa, then par
Refracting telescope
…Netherlands about 1608, when a spectacle maker from Middelburg named Hans Lippershey unsuccessfully tried to patent one. News of the patent spread fast and Galileo Galilei, happening to be in Venice in the month of May 1609, heard of the invention, constructed a version of his own, and applied it to making astronomical…
Portrait c. 1640
Portrait c. 1640
Portrait believed to be of Galileo's elder daughter Virginia, who was particularly devoted to her father
Portrait believed to be of Galileo's elder daughter Virginia, who was particularly devoted to her father
"Cannocchiali" telescopes at the Museo Galileo, Florence, suspected to be Galilean telescopes (top: 1610–1630; bottom: 1609–1640)
"Cannocchiali" telescopes at the Museo Galileo, Florence, suspected to be Galilean telescopes (top: 1610–1630; bottom: 1609–1640)
An illustration of the Moon from Sidereus Nuncius, published in Venice, 1610
An illustration of the Moon from Sidereus Nuncius, published in Venice, 1610