Johannes Kepler was a German mathematician, astronomer, astrologer, and natural philosopher born in 1571 who made several important contributions to astronomy and the scientific revolution. He discovered the laws of planetary motion, including that planets move in elliptical orbits with the sun at one focus, that a line joining a planet to the sun sweeps out equal areas in equal times, and that the square of the orbital period is proportional to the cube of the average distance from the sun. Kepler also invented eyeglasses and log books, and was a key figure of the 17th century scientific revolution, though he faced difficulties due to his beliefs.

1. Johannes
Kepler
By: Dominique Vinson
Aaron Wolf
Kirly Mejia

2. A little bit of his
history
✘ Johannes Kepler was a german mathematician, astronomer,
astrologer, and a natural philosopher.
✘ He lived from december 27, 1571 to november 17, 1630.
✘ Johannes was known as a major key to the 17th century scientific
revolution.
✘ Johannes had 6 sons and three daughters, he was remarried once
when his former wife died.
✘ He was forced to move time and time again due to his beliefs.

3. Great Inventions
✘ Eyeglasses
✘ Log Books
✘ Kepler Telescope
✘ The Rudolphine Tables
✘ The Astronomia Nova

4. ✘ I much prefer the sharpest criticism of a
single intelligent man to the thoughtless
approval of the masses.
✘ Truth is the daughter of time, and I feel no
shame in being her midwife.
✘ Nature uses as little as possible of anything.
✘ I demonstrate by means of philosophy that
the earth is round, and is inhabited on all
sides; that it is insignificantly small, and is
borne through the star
Four Famous Quotes

5. Kepler's Three
Laws

6. Law 1. The orbits of the planets are
ellipses, with the Sun at one focus.
Any ellipse has two geometrical points called the foci (focus for singular).There is
no physical significance of the focus without the Sun but it does have
mathematical significance. The total distance from a planet to each of the foci
added together is always the same regardless of where the planet is in its orbit.
The importance of this is that by not assuming the orbits are perfect circles, the
accuracy of predictions in the Sun-centered theory was (for the first time) greater
than those of the Earth-centered theory.

7. Law 2. The line joining a planet to the Sun
sweeps out equal areas in equal times as the
planet travels around the ellipse.
In any given amount of time, 30 days for instance, the planet sweeps out the
same amount of area regardless of which 30 day period you choose. Therefore
the planet moves faster when it is nearer the Sun and slower when it is farther
from the Sun. A planet moves with constantly changing speed as it moves about
its orbit. The fastest a planet moves is at perihelion (closest) and the slowest is at
aphelion (farthest).

8. Law 3. The square of the total time
period (T) of the orbit is proportional to
the cube of the average distance of the
planet to the Sun.
This law is sometimes referred to as the law of harmonies. It compares the orbital
time period and radius of an orbit of any planet, to those of the other planets. The
discovery Kepler made is that the ratio of the squares of the revolutionary time
periods to the cubes of the average distances from the Sun, is the same for every
planet.

9. Johannes kepler should win the nobel prize because of his great additions to
space exploration and the way the universe works. To allow us now to plan
things ahead using his theories and findings. But not only did he do that his
great inventions such as eyeglasses and logbooks are still used till this day. And
that is why Johannes Kepler should win this nobel prize.
Why he should
win.

10. Citations
✘ "Kepler: Johannes Kepler." Kepler: Johannes Kepler. Web. 15 Feb. 2016.
<http://kepler.nasa.gov/Mission/JohannesKepler/>.
✘ "Google." Google. Web. 15 Feb. 2016. <https://www.google.com/#q=johannes kepler quotes>.
✘ "Johannes Kepler Inventions and Accomplishments - Vision Launch." Vision Launch. 2014. Web. 15
Feb. 2016. <http://www.visionlaunch.com/johannes-kepler-inventions-and-accomplishments/>.
✘ "Bing." Bing. Web. 15 Feb. 2016. <http://www.bing.com/Images>.

11. Thank you
for listening