Observational astronomy
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Observational astronomy is a division of astronomy that is concerned with recording data about the observable universe, the practice and study of observing celestial objects with the use of telescopes
Mayall telescope at Kitt Peak National Observatory
An assembly in Estonia to observe meteors
Overview of types of observational astronomy by observed wavelengths and their observability.
Ultra HD photography taken at La Silla Observatory
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
Observational astronomy
…representatives. Those distant yardsticks can then be employed to measure other phenomena in that neighborhood, including the distance to a galaxy. Galileo Galilei turned a telescope to the heavens and recorded what he saw. Since that time, observational astronomy has made steady advances with each improvement in…
Portrait c. 1640
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)
An illustration of the Moon from Sidereus Nuncius, published in Venice, 1610