Astronomia i astrologia

Engraving of historical astronomy instruments.

Engraving of historical astronomy instruments.

Claudius Ptolemy (AD c100-170), Greek-Egyptian astronomer, geographer and mathematician at his observatory in Alexandria, Egypt. Among the instruments...

Claudius Ptolemy (AD c100-170), Greek-Egyptian astronomer, geographer and mathematician at his observatory in Alexandria, Egypt. Among the instruments...

This illustration shows a campaign planned in accordance with the phases of an eclipse. Military textbooks written at any time between 400 BC and AD17...

This illustration shows a campaign planned in accordance with the phases of an eclipse. Military textbooks written at any time between 400 BC and AD17...

This illustration shows a campaign planned in accordance with the phases of an eclipse. Military textbooks written at any time between 400 BC and AD17...

Sketch depicting a method of calculating the sun's elevation. One man keeps the instrument level, while the other man makes adjustments and reads the...

Sketch depicting a method of calculating the sun's elevation. One man keeps the instrument level, while the other man makes adjustments and reads the...

Sketch depicting a method of calculating the sun's elevation. Sketch by R. Dudleo, From "Dell'Arcano del Mare," Florence, 1647; Riccardiana Library, F...

Sketch depicting a method of calculating the sun's elevation. Sketch by R. Dudleo, From "Dell'Arcano del Mare," Florence, 1647; Riccardiana Library, F...

Illustration from "Le Grand Atlas de Cosmografie Blaviane," by the Dutch cartographer Johan Blaeu, showing Tycho Brahe's Uraniborg observatory on the...

Illustration from "Le Grand Atlas de Cosmografie Blaviane," by the Dutch cartographer Johan Blaeu, showing Tycho Brahe's Uraniborg observatory on the...

Illustration from "Le Grand Atlas de Cosmografie Blaviane," by the Dutch cartographer Johan Blaeu, showing Tycho Brahe's Uraniborg observatory on the...

Illustration from "Le Grand Atlas de Cosmografie Blaviane," by the Dutch cartographer Johan Blaeu, showing Tycho Brahe's Uraniborg observatory on the...

Illustration of an equatorial armillary sphere, containing one and a half circles, in Tycho Brahe's observatory. From "Le Grand Atlas de Cosmografia B...

Illustration of the "Leviathan of Parsonstown," a 72-inch reflecting telescope built in the 1840s by William Parsons, 3rd Earl of Rosse, on his estate...

Illustration from "Le Grand Atlas de Cosmografie Blaviane," by the Dutch cartographer Johan Blaeu, showing Tycho Brahe's Uraniborg observatory on the...

Quadrant was used by Hevelius in the 17th century to measure the position of celestial bodies.

Astronomical clock.

An astronomical sextant belonging to Tycho Brahe (1546-1601), the Danish astronomer, astrologer and alchemist. After becoming interested in astronomy...

An illustration showing a person calculating the angle between Aldebaran (the brightest star in the constellation Taurus) and the moon, with respect t...

An eighteenth century illustration of a celestial sphere, or rather a representation of the hemisphere of the heavens that can be seen from the northe...

Christoph Scheiner (c.1573-1650), a German Jesuit father, physicist and astronomer, and a co-discoverer of sunspots.

Provided with a model of the celestial sphere, reference books and dividers, a medieval astrologer draws up a horoscope in this engraving from Robert...

An equatorial telescope, mounted so that it has two axes of motion at right angles to each other, one parallel to the axis of the earth.

In 1575, when the Ottoman empire was at its height, the astronomer Taqi ad-Din founded an observatory at Galata (now part of Istanbul, Turkey). This p...

An illustration of the northern hemisphere of a brass celestial globe belonging to Major-General Sir John Malcolm. The brass globe was made by Muhamma...

An illustration of the southern hemisphere of a brass celestial globe belonging to Major-General Sir John Malcolm. The brass globe was made by Muhamma...

A meridian circle or transit circle, an instrument for observing the time of stars passing the meridian, while also measuring their angular distance f...

German astronomer Johannes Kepler's conceptualization of the orbit of Mars. Kepler (1571-1630), devised the three fundamental laws of planetary motion...

An illustration of a passage instrument, an astronomical tool used to determine the time stars pass through the local meridian. Knowing this allowed a...

Model of the orbit of the planets by Johannes Kepler, devised in 1596-97. German astronomer Kepler devised the three fundamental laws of planetary mot...

A reflecting circle, used to measure longitude by calculating the distance between the moon and a nearby star. German astronomer Johann Tobias Mayer d...

English astronomer William Lassell's 24-inch reflecting telescope, completed in 1845. Lassell's (1799-1880) telescope was the first to be mounted equa...

A diagram of 1660 showing the sun-centred universe, an idea revived by Copernicus.

Illustration of sunspots from Galileo's 1613 book on the sun. Galileo Galilei (February 15, 1564 - January 8, 1642) was an Italian physicist, mathemat...

A transit instrument, used for precisely observing the positions of stars.

A universal instrument, which is a type of transit instrument, used for precisely observing the positions of stars. The universal instrument allows fo...

Uraniborg, an astronomical observatory operated by Tycho Brahe in Denmark. Tycho Brahe (1546-1601) was a Danish astronomer. After becoming interested...

An historical astronomical instrument, the heliotropii telioscopici or helioscope, used for observing and following the sun's motion. The first one wa...

An illustration of an armillary sphere (also known as spherical astrolabe, armilla, or armil), which is a model of the celestial sphere. This woodcut...

Astronomical clock. Color enhancement of BN2256.

An illustration showing a person calculating the angle between Aldebaran (the brightest star in the constellation Taurus) and the moon, with respect t...

An illustration of the northern hemisphere of a brass celestial globe belonging to Major-General Sir John Malcolm. The brass globe was made by Muhamma...

An illustration of the southern hemisphere of a brass celestial globe belonging to Major-General Sir John Malcolm. The brass globe was made by Muhamma...

An equatorial telescope, mounted so that it has two axes of motion at right angles to each other, one parallel to the axis of the earth. Color enhance...

An eighteenth century illustration of a celestial sphere, or rather a representation of the hemisphere of the heavens that can be seen from the northe...

An illlustration of the northern constellation Perseus. It is named after the Greek Hero who slew the gorgon Medusa. The variable star Algol represent...

Line drawing of an early sixteenth-century woodcut of the universe, showing a man thrusting his head through the starry firmament into infinity. From...