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2020-09-29

astr-1101

Galileo presentation by Debbie and Ron
- Astronomer, physicist, engineer, philosopher
- Father of Observational Astronomy, Father of Physics, Father of Scientific Method, Father of Modern science
- Contributions
  - Scientific method
    - Encouraged mathematical language
  - Astronomy
  - Engineering
    - The Little Balance
    - Accurately weigh solids in air and water
  - Physics
    - Law of falling bodies
  - Mathematics
    - Military compass
  - Telescope
    - Means far seeing
    - Increased magnification 8x of what we could see
    - Published in Starry Messenger
      - In Griffiths Observatory
  - Discoveries with the telescope
    - Lunar surface (Moon)
      - Uneven lunar surface
    - Moons of Jupiter
      - Originally thought they were stars
      - Didn't follow same pattern as other stars
    - Phases of Venus
      - Similar to phases of the Moon
    - Saturn's rings
      - Thought they looked like moons
      - Noticed they would appear/disappear
    - Sunspots
    - Stars of the Milky Way galaxy
  - Inventions
    - Proportional compass
      - Used for military
    - Escapement
    - Celatone
      - Helmet with a telescope
      - Galileo used it to observe Jupiter's moon
  - Life
    - Originally considered priesthood
    - Dropped out of college
    - Was imprisoned by the church when he opposed the geocentric model
      - Imprisoned for life
    - Had three daughters who became nuns
  - Any time he did experiments with time, he used his pulse
Geo/helio presentation by Graham and Ben
- Geocentric model
  - Theory that everything is orbiting around Earth
  - Ptolemy and Aristotle
  - Didn't have technology to refute it
- Heliocentric model
  - Copernicus
  - Banned by the church until 1758