KrisReinholdTimeline

Nicholas Copernicus

Feb 7, 1497

Copernicus was one of the most famous astronomers of the 1500's. Although in 1497 he was fascinated after experiencing eclipse by the moon of the star Aldebaran in the year 1947. He also authored several books on astromoners. Picture URL- http://www.brianstimelines.co.uk/Astronomers2.html

Tycho Brahe

Mar 4, 1572

In 1972 he found a Supernova near the Cassiopeia constellation. He later built the astronomy observatory, which is now known as the castle of Uranienborg. Tycho worked to combine the geometrical benefits of the Copernican system with the philosophical benefits of the Ptolemaic system only to create his own model of the universe, the Tychonic system. Pic URL- http://www.brianstimelines.co.uk/Astronomers2.html

Johann Bayer

Mar 9, 1603

In 1603, Bayer published his first book of star charts and it was called Uranometria. Bayer used Tycho Brahe’s catalogue of stars to find their positions. He worked on assigning a Greek letter prefix to each star that indicated its brightness within its galaxy. The Greek letter was followed by the name of the galaxy in which the star was found. Pic URL: http://www.realmagick.com/johann-bayer/

Johannes Kepler

Jul 20, 1609

Kepler published his first two laws in 1609 in the book "Astronomia Nova". Commentaries on the motion of mars. Keplers discovery of these laws helps us better understand the ways the planets move. Picture URL- http://www.brianstimelines.co.uk/Astronomers2.html

Galileo Galilei

Nov 16, 1609

In 1609 Galileo built a telescope twenty times faster than the first. It was able to view craters on the moon, stars in the milky way, and the four largest satelites of Jupiter and the phases of Venus. He is one of the most famous astronomers of all time. Pic URL- http://www.brianstimelines.co.uk/Astronomers2.html

Bonaventura Cavalieri

Mar 27, 1639

Cavalieri was an extremely intelligent man in the 1600's. Cavalieri was also largely responsible for introducing logarithms as a great tool, he wrote about it in his book Directorium Generale Uranometricum. The tables of logarithms which he published included logarithms of trigonometric functions for use by astronomers. Pic URL- http://www.gap-system.org/~history/Biographies/Cavalieri.html

John Baptist Riccioli

Aug 1, 1640

Riccioli is a noted astronomer most remembered for discovering Mizar- the first double star. This took place in 1640. Riccioli's usual area of expertise was the study of lunar objects. Picture URL- http://bellapatton.weebly.com/index.html

Christiaan Huygens

Dec 18, 1655

In 1965, Huygens discovered Saturns moon Titan. He also discovered that its rings consist of rocks. Huygens discovered several interstellar nebulae and some double stars. Pic URL- http://en.wikipedia.org/wiki/Christiaan_Huygens

Giovanni Cassini

Jun 17, 1666

In 1665 and 1666 Cassini determined the rotation periods of Jupiter and Mars. Two years later he published a table of the motions of Jupiter's Galilean satellites. This table later helped Roemer in his estimate of the speed of light. Pic URL- http://www.brianstimelines.co.uk/Astronomers2.html

Edmond Halley

Nov 7, 1677

Halley was doing research in St Helena and he observed a transit of Mercury on 7 November 1677 and measured the locations of some 360 stars. This was the biggest thing that took place in his life because the catalogue he created was the first catalogue of the southern hemisphere stars and also the first mapping of stars compiled using a telescope. Pic URL- http://www.brianstimelines.co.uk/Astronomers2.html Pic URL- http://www.brianstimelines.co.uk/Astronomers2.html

Christoph Arnold

May 2, 1683

Interested in astronomy after being a farmer by profession, Arnold 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 and he observed the great comet of 1686, together with Gottfried Kirch. He also wrote a book which contains an account of the transit of Mercury in 1690. Pic URL- http://en.wikipedia.org/wiki/Christoph_Arnold

Isaac Newton

May 9, 1684

Newton did many significant things throughout his lifetime. In December of 1684 his first book "Principia" was published and it was what most people consider to be the founding of moden astonomy. He also discovered that white light was composed of colours that became visible when the light was passed through a prism. There are many other very significant things that took place in his life as well. Pic URL- http://www.brianstimelines.co.uk/Astronomers2.html

John Flamsteed

Dec 6, 1725

Flamsteed was one of the first observers to use a telescope in combination with a graduated arc for measuring angles.By 1703 he had completed more than 30,000 stellar positional measurements with a greater accuracy than had been achieved before. The final version of Flamsteed's star catalogue did not appear until 1725, six years after his death. Pic URL- http://www.brianstimelines.co.uk/Astronomers2.html