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1. Galileo Galilei
15 February 1564–8 January
1642
Report of KylaCabautan

3. GalileoGalileiis bestknown as:
"father of observational astrononomy“
"father of modern physics “
"father of science".

4. His contributions to observational astronomy
include the telescopic confirmation of
the phases of Venus, the discovery of the
four largest satellites of Jupiter (named
the Galilean moons in his honour), and the
observation and analysis of sunspots.
Galileo also worked in applied science and
technology, inventing an improved military
compass and other instruments.

5. Galileo's championing
of heliocentrism and Copernicanism was
controversial during his lifetime, when most
subscribed to eithergeocentrism or
the Tychonic system.He met with opposition
from astronomers, who doubted heliocentrism
because of the absence of an observed stellar
parallax.The matter was investigated by
the Roman Inquisition in 1615, which
concluded that heliocentrism was "foolish and
absurd in philosophy, and formally heretical
since it explicitly contradicts in many places the
sense of Holy Scripture."

6. With thetelescope,
Galileo was able to
view of the universe,
such as:

7. 1. The discovery
of the four
satellites, or
moons or biting
Jupiter.

8. 2. Planets are circular
disks rather than just
points of light.
-Indicated that planet
must be Earthlike

9. 3. He discovered that
the Venus phases just
like the moon,
demonstrating that
Venus orbits its source
of light----- the sun.

10. 4. The moon’s surface
is not a smooth glass
sphere, as the ancients
had not suspected and
the church had
decreed.

11. 5. The
sun had
sunspots

12. Summary of Galileo's
published written works

13. • Galileo's main written works are as follows:
• The Little Balance (1586)
• On Motion (1590)
• Mechanics (ca. 1600)
• The Starry Messenger (1610; in Latin, Sidereus Nuncius)
• Discourse on Floating Bodies (1612)
• Letters on Sunspots (1613)
• Letter to the Grand Duchess Christina (1615; published in 1636)
• Discourse on the Tides (1616; in Italian, Discorso del flusso e
reflusso del mare)
• Discourse on the Comets (1619; in Italian, Discorso Delle Comete)
• The Assayer (1623; in Italian, Il Saggiatore)
• Dialogue Concerning the Two Chief World Systems (1632; in Italian
Dialogo dei due massimi sistemi del mondo)
• Discourses and Mathematical Demonstrations Relating to Two New
Sciences (1638; in Italian, Discorsi e Dimostrazioni Matematiche,
intorno a due nuove scienze)

14. SketchbyGalileoofhowhe
sawJupiteranditsfour
largestsatellitesthroughhis
telescope.Thepositionsof
Jupiter’sfirstlargestmoons
(drawasstars)change
nightly.

15. Using a telescope, Galileo discovered
that Venus hasphases just like moon