# Johannes Kepler

Sr. | Johannes Kepler Quick Facts | Description |
---|---|---|

Sr. | Johannes Kepler Quick Facts | Description |

1. | Born | 27th December 1571, Germany |

2. | Profession | Scientist |

3. | Spouse(s) | Susanna Reuttinger(1613),Barbara muller (1597 to 1611) |

4. | Children | 8 |

5. | Parent(s) | F: Heinrich Kepler, Katharina Kepler |

6. | Died | 15th November 1630, Germany |

Johannes Kepler is widely famous today for his discovery of Planetary laws of motion. Kepler did important work in the field of Optics and also contributed to the development of Calculus in 1615 and also put forth the first proof of how logarithms worked in 1624. Moreover, Kepler calculated the most exact astronomical tables. I have written a short biography of Johannes Kepler.

## Early life and Education of Johannes Kepler

Johannes Kepler was born on December 27, 1571, in Weil der Stadt, a small town in the Holy Roman Empire, now is Germany. Kepler was only five years old when his father, Hienrich Kepler, earned precarious living as a mercenary soldier, and it is believed that his father died in a war. Kepler had to serve in an inn of his grandfather, to help his mother in the household responsibilities. Kepler’s hands were crippled and visually impaired by smallpox, but he was mentally strong. Kepler went to a local school for his early education and for his university education he attended University of Tübingen, then (as now) a bastion of Lutheran orthodoxy, there he studied philosophy and theology. At the age of 23, Kepler served as the teacher of mathematics and astronomy at the Protestant school in Graz, Austria in 1594.

## Kepler’s Astronomical Work

Kepler’s mother used to show him heavenly things including lunar eclipse to create interest for nature. Kepler never forgot the view of the lunar eclipse, he witnessed with his mother at the age of 9, for his the rest of his life. This also brought up the interest for Kepler which later transformed as greatest insight and grasp for the solar system and for lunar eclipse also. Kepler discovered three main laws of planetary motion, commonly defined as follows:

(1) the planets move in elliptical orbits with the Sun at one focus; (2) the time necessary to traverse any arc of a planetary orbit is proportional to the area of the sector between the central body and that arc (the “area law”) and (3) there is an exact relationship between the squares of the planets’ periodic times and the cubes of the radii of their orbits (the “harmonic law”)Kepler himself did not call these discoveries “laws,” as would become customary after Isaac Newton derived them from a new and quite different set of general physical principles. He regarded them as celestial harmonies that reflected God’s design for the universe.

Kepler was agreed with the heliocentric view of the solar system of Copernicus, Mystery of the Cosmos, a book published by Kepler about his belief and explanation belief that the sun exerted a force on the planets orbiting it.

Kepler main work as a mathematician was to create astronomical tables, but he really wanted to write The Harmony of the World as a development of Mystery of the Cosmos.

Kepler was also disagreed with Galileo about the cause of tides on the earth.Galileo believed the tides were caused by the earth spinning. Kepler identified that these tides were caused by the moon. Kepler also wrote, about a ‘magnetic force’ which we would today call the force of gravity. Last Theorem and Logarithmic Work Kepler left the world a puzzle: the Kepler Conjecture, a statement about the most efficient arrangement for packing spheres. Kepler’s Conjecture looks at how you can pack a bunch of equally sized spheres into the smallest possible space; he identified there are two most effective ways: cubic close packing and hexagonal close packing, Kepler was right.In 2015, Thomas Hales and coworkers provided a formal proof of Kepler’s conjecture. Kepler also proved how logarithms translate and reconstruct multiplications and divisions into additions and subtractions. Kepler’s proof opened the new and innovative ways for the mathematicians to use logarithm.

## Kepler’s Optics Work

Kepler discovered the inverse square law of light intensity in 1604. Kepler provided the first correct mathematical theory of the camera obscura and explanation of the human eye. Kepler wrote a study of the properties of lenses and developed an innovative explanation for the behavior of light in the newly invented telescope, now usually known as a Keplerian telescope.

## Married Life of Johannes Kepler

Kepler’s first marriage was with Barbara Müller, arranged through a broker. Barbara died at young age. Then he married Susanna Reuttinger in 1613, but the second marriage was a matter of practical necessity. Kepler needed someone to take care of children.

## Death of Johannes Kepler

Kepler fell ill and died on November 15, 1630, in the German city of Regensburg, at the age of 58.

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