Christoph Arnold (December 17, 1650—April 15, 1695) was a German amateur astronomer. December 17 is the 351st day of the year (352nd in leap years) in the Gregorian Calendar. ... // Events June 23 - Claimant King Charles II of England, Scotland and Ireland arrives in Scotland, the only of the three Kingdoms that has accepted him as ruler. ... April 15 is the 105th day of the year in the Gregorian calendar (106th in leap years). ... Events January 27 - Change of emperor of the Ottoman Empire from Ahmed II to Mustafa II (1695-1703) July 17 - The Bank of Scotland is founded by an Act of Parliament of the old Scottish Parliament. ... Radio telescopes are among many different tools used by astronomers Astronomy (Greek: αστρονομία = άστρον + νόμος, astronomia = astron + nomos, literally, law of the stars) is the science of celestial objects and phenomena that originate outside the Earths atmosphere, such as stars, planets, comets, auroras, galaxies, and the cosmic background radiation. ...

Born in Sommerfeld near Leipzig, Arnold was a farmer by profession. Interested in astronomy, he spotted the great comet of 1683, eight days before Hevelius did. He also observed the great comet of 1686. In 1686, Kirch went to Leipzig. There, he observed the great comet of 1686, together with Gottfried Kirch. There, Kirch met his second wife, Maria Margarethe Winckelmann (1670-1720), who had actually learned astronomy from Arnold. Sommerfeld can describe : Arnold Sommerfeld, a German physicist who is one of the founders of the quantum mechanics. ... (help· info) [] (Sorbian/Lusatian: Lipsk) is the largest city in the Federal State (Bundesland) of Saxony in Germany. ... Great Comet West in 1976 A Great Comet is a comet which becomes particularly bright and spectacular. ... Events June 6 - The Ashmolean Museum opens as the worlds first university museum. ... Johannes Hevelius Johannes Hevelius or Johann Hewelke or Johannes Hewel (German) or Jan Heweliusz (Polish) (January 28, 1611-January 28, 1687) was an astronomer; called the founder of lunar topography. ... Events The League of Augsburg is founded. ... Events The League of Augsburg is founded. ... (help· info) [] (Sorbian/Lusatian: Lipsk) is the largest city in the Federal State (Bundesland) of Saxony in Germany. ... Great Comet West in 1976 A Great Comet is a comet which becomes particularly bright and spectacular. ... Events The League of Augsburg is founded. ... Gottfried Kirch (Kirche, Kirkius) (December 18, 1639—July 25, 1710) was a German astronomer. ...

Arnold observed the transit of Mercury in front of the sun on October 13, 1690. For this work, he received some money and a tax exemption from the town of Leipzig. Atmospheric characteristics Atmospheric pressure trace Potassium 31. ... The Sun is the star at the center of Earths solar system. ... October 13 is the 286th day of the year (287th in leap years). ... Events Giovanni Domenico Cassini observes differential rotation within Jupiters atmosphere. ... A tax exemption is an exemption to the tax law of a state or nation in which part of the taxes that would normally be collected from an individual or an organization are instead foregone. ...

He died at Leipzig.

Arnold crater, on the Moon, is named after him. Arnold is a lunar crater that is located in the north-northeastern part of the visible Moon, near the lunar limb. ... Bulk composition of the moons mantle and crust estimated, weight percent Oxygen 42. ...

Sources

• Chris Plicht, Biographies
• Messier Catalog: Online Biography of Gottfried Kirch