1) Johannes Kepler discovered the three laws of planetary motion which described how planets move around the sun. 2) Sir Isaac Newton discovered the law of universal gravitation and formulated the laws of motion, laying the foundations of classical mechanics. 3) Anders Celsius developed the Celsius temperature scale used today.

2. Three laws of planetary motion.
Johannes Kepler (Weil der
Stadt, Germany, December 27, 1571 -
Regensburg, Germany, November
15, 1630), a key figure in the scientific
revolution, German astronomer and
mathematician, mainly known for his laws
of planetary motion in its orbit around the
Sun Tycho Brahe was collaborator, who was
replaced as imperial mathematician to
Rudolph II.

3. Laws motion and the law of gravitation
universal.
Sir Isaac Newton (December 25, 1642 JU -
March 20, 1727 JU, January 4, 1643 GR - March
31, 1727 GR) was a physicist, philosopher,
theologian, inventor, alchemist and English
mathematician, author of the Philosophiae
naturalis principia mathematica, better known
as the Principia, which described the law of
universal gravitation and laid the foundations
of classical mechanics with the laws that bear
his name.

4. Thermometer Celsius.
Anders Celsius Anders Celsius (1701 -
1744) was a physicist and astronomer
Swedish. Professor of astronomy at
Uppsala University (1730-1744). He
oversaw the construction of the
Observatory of Uppsala, where he was
appointed director in 1740. In 1733 he
published a collection of 316
observations of aurora borealis.

5. Voltaic pile forerunner of the electric battery
Alessandro Giuseppe Antonio Anastasio
Volta (Como, February 18, 1745 -
ibidem, March 5, 1827) was an Italian
physicist, most famous for having
developed the electric battery in 1800.
Alessandro Volta, or Count Alessandro
Giuseppe Antonio Anastasio Volta, physicist
and pioneer in the study of electricity, was
born in Lombardy, Italy, on February
18, 1745, in the bosom of a noble family.

6. Number law and Avogadro.
Amedeo Avogadro (Lorenzo Romano Amedeo Carlo
Avogadro), Count of Quaregna and
Cerreto, (Turin, August 9, 1776 - Turin, July 9, 1856) was
an Italian physicist and chemist, Professor of Physics
at the University of Turin in 1834 . Formulated called
Avogadro's Law, which states that equal volumes of
different gases under the same conditions of pressure
and temperature contain the same number of
particles. He advanced in the study and
development of atomic theory, and in his honor was
given the name to the Avogadro number.