Category Archives: Historical

Historical Astronomers in Context

Posted on February 2, 2023 by shuhuaiwang

Johannes Kepler（12/27/1571 – 11/15/1630） In 1609, Keple […] Continue reading →

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Historical Astronomers in Context

Posted on February 1, 2023 by georgeboardman20

Tycho Brahe was an aspiring Danish lawyer when he first became fascinated in astronomy. He was reportedly inspired by a total solar eclipse then later a conjunction of Jupiter and Saturn, which is where his practical advancements in astronomy came from. The Ptolemaian and Copernican models were off by several days on predicting the conjunction, […] Continue reading →

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To Be Circular, or Elliptical: That Was Kepler’s Question

Posted on February 1, 2023 by Europa

Johannes Kepler was an astronomer and mathematician best known for his development of the three laws of planetary motion. The first reflected a major upheaval in astronomical thought at the time: that planetary orbits are elliptical, with the Sun located at one of each orbit’s two foci, rather than perfectly circular. The second is that […] Continue reading →

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Historical Astronomers in Context

Posted on February 1, 2023 by lucasliu6

Introduction to Galileo Galilei Galileo di Vincenzo Bonaiuti de’ Galilei (15 February 1564 – 8 January 1642) He observed the sky with a telescope. With the telescope, he discovered that the moon has mountains, canyons, and craters. He also found the phases of Venus and sunspots. Moreover, he detected the Milky way galaxy which is made up […] Continue reading →

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Historical Astronomers in Context

Posted on February 1, 2023 by berlinbe

Nicholas Copernicus was a Polish astronomer who was born on February 19,1473 and died on May 24, 1543. Copernicus was important to astronomy because he formulated and popularized the idea that the Sun, rather than the Earth, was the center of the “universe.” He also accurately described how Earth’s rotation was the cause of sunrise […] Continue reading →

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Historical Astronomers in Context

Posted on February 1, 2023 by Andrew Cascio

Johannes Kepler: As a young apprentice of Tycho Brahe, Johannes Kepler had years of naked-eye observations to make discoveries with. Between the discrepancies surrounding Tycho’s observations and the Copernican belief that planetary orbits are perfect circles, Kepler surmised that planetary orbits are ellipses. He took his discoveries and named three laws of planetary motion that […] Continue reading →

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Historical Astronomers in Context

Posted on February 1, 2023 by cuia2

Johannes Kepler (Birth date – December 27th, 1571, Death date – November 15th, 1630) Kepler was important to astronomy because he rejected the tens of thousands year old belief that the Earth was the center of the universe and planets orbited in perfect circles. He instead created Kepler’s three laws of planetary motion, which suggest […] Continue reading →

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Historical Astronomers in Context

Posted on February 1, 2023 by zws42

Tycho Brahe (1546-1601) Tycho Brahe was the best naked eye observer of all time. He lived before the invention of the telescope, and therefore had to rely on his vision for all of his observations. He presented a geo-heliocentric model of the solar system in which the sun and moon revolved around Earth but everything […] Continue reading →

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Historical Astronomers in Context

Posted on February 1, 2023 by willems49

Of the given astronomers, I chose Tycho Brahe (December 14, 1546 – October 24, 1601): Tycho Brahe created precise instruments for observing and measuring the sky before the creation of the telescope. He kept a meticulous record of stars and planets- in particular Mars along with a new model of the solar system which would […] Continue reading →

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Historical Astronomers in Context

Posted on February 1, 2023 by sydneyastr2110

Johannes Kepler Johannes Kepler, who lived from 1571 to 1630, revealed three laws of planetary motion which explain the motion of the planets in the solar system. The first law concerning orbits states that all planets move around the Sun in an elliptic orbit. The second law, the “area law,” implies that a planets angular […] Continue reading →

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