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Heliocentrism
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Heliocentrism is a superseded astronomical model that placed the Sun at the center of the universe, with the Earth and the planets in its orbit. It superseded geocentrism, which placed the Earth at th
Andreas Cellarius's illustration of the Copernican system, from the Harmonia Macrocosmica
Andreas Cellarius's illustration of the Copernican system, from the Harmonia Macrocosmica
Aristarchus' 3rd century BCE calculations on the relative sizes of Earth, the Sun, and the Moon, from a 10th-century CE Greek copy
Aristarchus' 3rd century BCE calculations on the relative sizes of Earth, the Sun, and the Moon, from a 10th-century CE Greek copy
An illustration from al-Biruni's astronomical works explains the different phases of the Moon with respect to the position of the Sun.
An illustration from al-Biruni's astronomical works explains the different phases of the Moon with respect to the position of the Sun.
Nicholas of Cusa, 15th century, asked whether there was any reason to assert that any point was the center of the universe.
Nicholas of Cusa, 15th century, asked whether there was any reason to assert that any point was the center of the universe.
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
Heliocentrism
…Revolution. In the following century, Johannes Kepler introduced elliptical orbits for all planets discovered up to his time (genuinely heliocentric), and Galileo Galilei presented observations of the Solar System made using his telescope. With the observations of William Herschel, Friedrich Bessel, and other astronomers…
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