Class Notes - Models of the Universe
Opening Prayer
Begin class with a prayer for wisdom and understanding.
Invocation to the Holy Spirit for guidance.
Philosophy of the University
The University of Perpetual Help System DALTA emphasizes divine guidance in education for national development.
Commitment to teaching, community service, and research.
Motto: "Helpers of God" and principle of character building.
Concept of Human Development
The University aims to nurture students with Christian values and prepare them for global participation.
Focus on producing socially responsible individuals committed to high-quality education and healthcare.
Historical Models of the Universe
Geocentric Model: Earth-centered models by Eudoxus, Aristotle, Ptolemy, and Tycho Brahe.
Heliocentric Model: Sun-centered theories by Aristarchus, Copernicus, and later supported by Galileo and Kepler.
Key Historical Figures
Eudoxus: Proposed concentric spheres for planetary motion.
Aristotle: Established the spherical Earth model at the universe's center.
Ptolemy: Developed detailed geocentric system.
Tycho Brahe: Observational innovations and mixed model (Tychonic model).
Aristarchus: Early proponent of heliocentric theory.
Copernicus: Formalized heliocentric model.
Galileo Galilei: Used telescope; discovered sunspots and Venus phases.
Johannes Kepler: Formulated laws of planetary motion; demonstrated orbits are elliptical.
Kepler's Laws of Planetary Motion
Law of Ellipses: Planets orbit in ellipses with the sun at one focus.
Law of Equal Areas: A line segment connecting a planet to the sun sweeps out equal areas in equal time intervals.
Harmonic Law: The square of the orbital period is proportional to the cube of the semi-major axis of the orbit.
Summary
Develop a timeline of significant figures and models in the history of astronomy.
Reflects the evolution of understanding regarding the structure of the universe.
Closing
End with a blessing for joyful learning and understanding.