1. Astronomers
in
the Age of
Enlightenment
Gabriel Supang

2.  Professor of astronomy at
the university of Bologna.
 Director of Paris observatory
 He found four moons orbiting
Saturn
 the Cassini division. (The
division of Saturn's ring).
 He calculated the rotation
time of the Jupiter and Mars
 Watched the phases of the
mars
 he discovered Rhea which is
another one of Saturn's
moons.
 Cassini-huygens ( Cassini
space mission.
Giovanni Cassini (1625

3. Edmond Halley
(1656 -1742)
 discovered the proper
motion of stars and the
periodicity of comets.
 A Synopsis of the
Astronomy of Comets'
published in 1705
 catalogued the positions of
about three hundred and
fifty Southern Hemisphere
stars
 observed a transit of
Mercury and transits of
Venus, these could be
used to determine the
distance of the Sun.

4. Christian
Huygens(1629 -
1695)
method for grinding and
polishing lenses, making
telescopes more powerful.
exact means of measuring
time which led to the
invention of the pendulum
clock
he discovered the
achromatic eye-piece of a
telescope.

5. Sir William
Herschel(1738 -
 discover of Uranus
 Georgium sidus (Georges
star) king George III, London
 Helped advance our
understanding about nebula.
Made a catalog of 2,500
astronomical objects.
 He found the polar ice caps
on Mars.
 he discovered the sixth moon
(Enceladus) of Saturn. A
month later he found Mimas,
the seventh satellite of Saturn.

6. Sir Isaac
Newton
(1643 - 1727)
theory of universal gravitation
the laws of motion
mathematician who developed
extensive mathematics to
describe the astronomical
models of Copernicus and
Kepler.
His Theory of Universal
Gravitation was the foundation
of Kepler's laws of planetary
motion
credited with writing the
greatest scientific book in 1687
universally known as the
Principia.

7. Charles
Messier(1730-
comet-hunter who published
a list of 110 astronomical
objects.
The M objects, as they are
now called, are used today
to identify the most brilliant
objects in the sky.
List includes some of the
most intriguing sights visible
through small telescopes,
including galaxies, nebulae,
and star clusters.