Dinesh's photos with the keyword: Griffith Observatory

he Twenty mile wide impact crater Kepler is the most prominent feature in this picture takenby Lunar Orbiter 3 in February 1967. The robotic Lunar Orbiter program created detailed photographs of nearly all the Moon’s surface in preparation for the Apollo program en.wikipedia.org/wiki/Kepler_(lunar_crater) www.nasa.gov/mission_pages/LRO/multimedia/lroimages/lroc-20101109-kepler.html

sciencing.com/history-pendulum-4965313.html A pendulum is an object or weight suspended from a pivot point. When a pendulum is set in motion, gravity causes a restoring force that will accelerate it toward the center point, resulting in a back and forth swinging motion. The word "pendulum" is new Latin, derived from the Latin "pendulus," which means "hanging." Pendulums were used in many historic scientific applications. Dutch scientist Christiaan Huygens built the first pendulum clock in 1656, increasing timekeeping accuracy from 15 minutes to 15 seconds per day n 1818, Henry Kater devised the reversible Kater's pendulum to measure gravity, and it became the standard measurement for gravitational acceleration over the next century.

Geology and Biology An old man symbolic of geology holds a card showing mineral crystals. Through a microscope, a biologist studies life with a chicken embryo, plant, and crab below. A man symbolizing paleontology shows a saber-toothed cat skull, with a fish skeleton below.

Mathematics and Physics First is a Greek geometer, whose work derived from the Egyptians. Their influence is shown by the god Thoth, behind. An Arab looks at the important mathematical contributions of his culture. The seated man, looking into the murky cloud represents physics. Sir Isaac Newton, originator of calculus, talks with students on the right.

Engineering On the left, an ancient Egyptian stands before a pyramid, an impressive monument to ancient engineering. Two grappling figures represent forces within the earth associated with inevitable earthquakes which engineers must build to withstand. Modern engineering is represented by a surveyor and Hoover Dam. www.youtube.com/watch?v=0-hvBThPhkI

www.uranos.fr/SOM_FR_04_D1.htm À la Renaissance, la cartographie céleste européenne est la même, du moins pour ce qui concerne les constellations qui sont toujours 44, comme chez Ptolémée et les astronomes arabes. Ce n’est qu'à la fin du XVIe siècle que le ciel va commencer à se modifier. During the Renaissance, the European celestial cartography is the same, at least as far as the constellations are concerned, which are always 44, as with Ptolemy and the Arab astronomers. It was not until the end of the 16th century that the sky began to change.

en.wikipedia.org/wiki/Tesla_coil

www.princeton.edu/~hos/Mahoney/articles/huygens/casestud/casestudfr.html

Navigation On the left, a symbolic figure of the Wind grasps a sundial and compass. Calm is shown to the right, holding a modern sextant. The moon orbits diagrammatically around the two figures. At the top is an astrolabe, an early astronomical instrument.

Aeronautics The artist portrays Archytas of Tarentum with his wooden pigeon; then Roger Bacon with his floating ball; Francesco de Lana with a flying boat model; Leonardo da Vinci, whose models perhaps needed only an engine; and Besnier, gliding successfully in 1678.

Astronomy On the left, Arzachel consults his early astronomical tables. John of Hollywood works on an influential astronomical text. Copernicus, who replaced the Earth with the Sun as the center of the solar system, stands near Galileo, whose telescope is dwarfed by a modern version.

The telescope is one of humankind's most important inventions, although we’re not entirely sure who to give the credit to. The first person to apply for a patent for a telescope was Dutch eyeglass maker Hans Lippershey (or Lipperhey). In 1608, Lippershey laid claim to a device that could magnify objects three times. His telescope had a concave eyepiece aligned with a convex objective lens. One story goes that he got the idea for his design after observing two children in his shop holding up two lenses that made a distant weather vane appear close. Others claimed at the time that he stole the design from another eyeglass maker, Zacharias Jansen. www.space.com/21950-who-invented-the-telescope.html

griffithobservatory.org/exhibits/w-m-keck-foundation-central-rotunda/hugo-ballin-murals www.youtube.com/watch?v=0-hvBThPhkI

Johannes Hevelius with one of his telescopes (from Selenographia, 1647, an elaborate map of the moon). Hevelius, who lived in Danzig, Poland, built one enormous telescope 150 feet long. he also published an important star atlas. (No drawing or engraving records Galielo's telescopes, and the two of his manufacture which survive are not as powerful as the one he was using in 1610/11. Thus we do not know what this own astronomical telescope looked lime) en.wikipedia.org/wiki/Johannes_Hevelius