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Martin Van Den Hove
Martin (Maarten) van den Hove (Latinized as Martinus Hortensius (Ortensius)) (1605 – 7 August 1639) was a Dutch astronomer and mathematician. His adopted Latin name is a translation of the Dutch ''hof'' ("garden"), in Latin ''horta''. Early life Born in Delft, he studied at Leiden University under Snellius and Isaac Beeckman from 1625 to 1627. He received further instruction from Snellius from 1628 to 1630 at Leiden and at Ghent. Van den Hove and Philippe van Lansberge In 1628, he began studying under Philippe van Lansberge, who was introduced to him by Beeckman. Van den Hove became an enthusiastic supporter of Landsberge, who was by now quite aged, and helped Landsberge complete his project to "restore astronomy" (i.e. create new systematic observations to replace old, insufficient data). Landsberge thanked Van den Hove publicly, considered himself lucky that "by divine providence, in my old age, pressed by sickness, such a strong helper came to my aid, as formerly the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martinus Hortensius
Martin (Maarten) van den Hove (Latinized as Martinus Hortensius (Ortensius)) (1605 – 7 August 1639) was a Dutch astronomer and mathematician. His adopted Latin name is a translation of the Dutch ''hof'' ("garden"), in Latin ''horta''. Early life Born in Delft, he studied at Leiden University under Snellius and Isaac Beeckman from 1625 to 1627. He received further instruction from Snellius from 1628 to 1630 at Leiden and at Ghent. Van den Hove and Philippe van Lansberge In 1628, he began studying under Philippe van Lansberge, who was introduced to him by Beeckman. Van den Hove became an enthusiastic supporter of Landsberge, who was by now quite aged, and helped Landsberge complete his project to "restore astronomy" (i.e. create new systematic observations to replace old, insufficient data). Landsberge thanked Van den Hove publicly, considered himself lucky that "by divine providence, in my old age, pressed by sickness, such a strong helper came to my aid, as formerly the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middelburg, Zeeland
Middelburg () is a List of cities in the Netherlands by province, city and List of municipalities of the Netherlands, municipality in the south-western Netherlands serving as the Capital (political), capital of the Provinces of the Netherlands, province of Zeeland. Situated on the central peninsula of the Zeeland province, ''Midden-Zeeland'' (consisting of former islands Walcheren, Noord-Beveland and Zuid-Beveland), it has a population of about 48,000. In terms of technology, Middelburg played a role in the Scientific Revolution at the early modern period. The town was historically a center of Lens (optics), lens crafting in the Dutch Golden Age, Golden Age of Dutch science and technology. The invention of the microscope and invention of the telescope, telescope is often credited to Middelburg spectacle-makers (including Zacharias Janssen and Hans Lipperhey) in the late 16th century and early 17th century. History The city of Middelburg dates back possibly to the late 8th ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
On Sizes And Distances (Hipparchus)
''On Sizes and Distances (of the Sun and Moon)'' () is a text by the Ancient Greek astronomy, ancient Greek astronomer Hipparchus () in which approximations are made for the radii of the Sun and the Moon as well as their Astronomical unit, distances from the Earth. It is not Extant literature, extant, but some of its contents have been preserved in the works of Ptolemy and his commentator Pappus of Alexandria. Several modern historians have attempted to reconstruct the methods of Hipparchus using the available texts. Sources Most of what is known about Hipparchus' text comes from two ancient sources: Ptolemy and Pappus. The work is also mentioned by Theon of Smyrna and others, but their accounts have proven less useful in reconstructing the procedures of Hipparchus. Ptolemy In ''Almagest'' V, 11, Ptolemy writes: : Now Hipparchus made such an examination principally from the sun. Since from other properties of the sun and moon (of which a study will be made below) it follows th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hipparchus
Hipparchus (; , ; BC) was a Ancient Greek astronomy, Greek astronomer, geographer, and mathematician. He is considered the founder of trigonometry, but is most famous for his incidental discovery of the precession of the equinoxes. Hipparchus was born in Nicaea, Bithynia, and probably died on the island of Rhodes, Greece. He is known to have been a working astronomer between 162 and 127 BC. Hipparchus is considered the greatest ancient astronomical observer and, by some, the greatest overall astronomer of classical antiquity, antiquity. He was the first whose quantitative and accurate models for the motion of the Sun and Moon survive. For this he certainly made use of the observations and perhaps the mathematical techniques accumulated over centuries by the Babylonians and by Meton of Athens (fifth century BC), Timocharis, Aristyllus, Aristarchus of Samos, and Eratosthenes, among others. He developed trigonometry and constructed trigonometric tables, and he solved se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telescope
A telescope is a device used to observe distant objects by their emission, Absorption (electromagnetic radiation), absorption, or Reflection (physics), reflection of electromagnetic radiation. Originally, it was an optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects – an optical telescope. Nowadays, the word "telescope" is defined as a wide range of instruments capable of detecting different regions of the electromagnetic spectrum, and in some cases other types of detectors. The first known practical telescopes were refracting telescopes with glass lenses and were invented in the Netherlands at the beginning of the 17th century. They were used for both terrestrial applications and astronomy. The reflecting telescope, which uses mirrors to collect and focus light, was invented within a few decades of the first refracting telescope. In the 20th century, many new types of telescopes were invented, including radio telescopes in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diameter
In geometry, a diameter of a circle is any straight line segment that passes through the centre of the circle and whose endpoints lie on the circle. It can also be defined as the longest Chord (geometry), chord of the circle. Both definitions are also valid for the diameter of a sphere. In more modern usage, the length d of a diameter is also called the diameter. In this sense one speaks of diameter rather than diameter (which refers to the line segment itself), because all diameters of a circle or sphere have the same length, this being twice the radius r. :d = 2r \qquad\text\qquad r = \frac. The word "diameter" is derived from (), "diameter of a circle", from (), "across, through" and (), "measure". It is often abbreviated \text, \text, d, or \varnothing. Constructions With straightedge and compass, a diameter of a given circle can be constructed as the perpendicular bisector of an arbitrary chord. Drawing two diameters in this way can be used to locate the center of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jupiter's Moons
There are 97 Natural satellite, moons of Jupiter with confirmed orbits . This number does not include a number of meter-sized moonlets thought to be shed from the inner moons, nor hundreds of possible kilometer-sized outer irregular moons that were only briefly captured by telescopes. All together, Jupiter's moons form a satellite system (astronomy), satellite system called the Jovian system. The most massive of the moons are the four Galilean moons: Io (moon), Io, Europa (moon), Europa, Ganymede (moon), Ganymede, and Callisto (moon), Callisto, which were independently discovered in 1610 by Galileo Galilei and Simon Marius and were Timeline of discovery of Solar System planets and their moons, the first objects found to orbit a body that was neither Earth nor the Sun. Much more recently, beginning in 1892, dozens of far smaller Jovian moons have been detected and have received the names of lovers (or other sexual partners) or daughters of the Roman mythology, Roman god Jupiter (m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galileo
Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642), commonly referred to as Galileo Galilei ( , , ) or mononymously as Galileo, was an Italian astronomer, physicist and engineer, sometimes described as a polymath. He was born in the city of Pisa, then part of the Duchy of Florence. Galileo has been called the father of observational astronomy, modern-era classical physics, the scientific method, and modern science. Galileo studied speed and velocity, gravity and free fall, the principle of relativity, inertia, projectile motion and also worked in applied science and technology, describing the properties of the pendulum and " hydrostatic balances". He was one of the earliest Renaissance developers of the thermoscope and the inventor of various military compasses. With an improved telescope he built, he observed the stars of the Milky Way, the phases of Venus, the four largest satellites of Jupiter, Saturn's rings, lunar craters and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Navigation
Navigation is a field of study that focuses on the process of monitoring and controlling the motion, movement of a craft or vehicle from one place to another.Bowditch, 2003:799. The field of navigation includes four general categories: land navigation, marine navigation, air navigation, aeronautic navigation, and space navigation. It is also the term of art used for the specialized knowledge used by navigators to perform navigation tasks. All navigational techniques involve locating the navigator's Position (geometry), position compared to known locations or patterns. Navigation, in a broader sense, can refer to any skill or study that involves the determination of position and Relative direction, direction. In this sense, navigation includes orienteering and pedestrian navigation. For marine navigation, this involves the safe movement of ships, boats and other nautical craft either on or underneath the water using positions from navigation equipment with appropriate nautical char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optics
Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of optical instruments, instruments that use or Photodetector, detect it. Optics usually describes the behaviour of visible light, visible, ultraviolet, and infrared light. Light is a type of electromagnetic radiation, and other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties. Most optical phenomena can be accounted for by using the Classical electromagnetism, classical electromagnetic description of light, however complete electromagnetic descriptions of light are often difficult to apply in practice. Practical optics is usually done using simplified models. The most common of these, geometric optics, treats light as a collection of Ray (optics), rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Amsterdam
The University of Amsterdam (abbreviated as UvA, ) is a public university, public research university located in Amsterdam, Netherlands. Established in 1632 by municipal authorities, it is the fourth-oldest academic institution in the Netherlands still in operation. The UvA is one of two large, publicly funded research universities in the city, the other being the Vrije Universiteit Amsterdam (VU). It is also part of the largest research universities in Europe with 31,186 students, 4,794 staff, 1,340 PhD students and an annual budget of €600 million. It is the List of universities in the Netherlands, largest university in the Netherlands by enrollment. The main campus is located in Amsterdam-Centrum, central Amsterdam, with a few faculties located in adjacent Government of Amsterdam, boroughs. The university is organised into seven faculties: Humanities, Social science, Social and Psychology, Behavioural Sciences, Economics and Business, Science, Law, Medicine, Dentistry. Clo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caspar Barlaeus
Caspar Barlaeus (12 February 1584 – 14 January 1648) was a Dutch polymath and Renaissance humanist, a theologian, poet, and historian. Life Born Caspar (Kaspar) van Baerle in Antwerp, Barlaeus' parents fled the city when it was occupied by Spanish troops shortly after his birth. They settled in Zaltbommel, where his father eventually would become head of the Latin school. Caspar studied theology and philosophy at the University of Leiden. After his study, he preached for 1.5 years in the village of Nieuwe-Tonge, before returning to Leiden in 1612 as an under-regent of a college. From 1617 he also was professor in philosophy at the university. Because of his remonstrant sympathies, he was forced out of this job in 1619. He then studied and graduated in medicines (in Caen), but never practiced professionally. From 1631, he was professor of philosophy and rhetoric at the Amsterdam Athenaeum, '' Athenaeum Illustre''), which is commonly regarded as the predecessor of the University ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
