• consistent with Aristole and observation
• first person to describe planets and stars
• 200 CE

• developed the solar centric model
• everything went around the sun 
• 1473-1534

• no interest in mathermatics
• one of the first to do induction
• 1561-1626

• mathematician 
• came up with the X and Y axis
• used matheical tools and had a math state of mind
• 1596-1650

• collected data about planet without a telescope
• 1546-1601

• data to derive a mathematical formal for eplliptical orbits
• 1571-1630

• invented the telescope
• discovered the moons of jupiter and phase of venus
• 1564-1642

• invented calculus
• discovered laws of classic physics
• founded modern optics
• 1642-1726

• weathly nobleman
• beheaded during french revolutoin 
• founded modern chemistry 
• first person to understand chemical reactions
• 1743-1794

• first american scientist 
• developed chemical thermodynamics
• 1839-1903

• created theory of relativity 
• 1879-1955

Gilbert Lewis

• lewis dot structure
• developed theory of chemical bond
• 1875-1955

• created modern language for describing chemical bonds
• 1901-1994

• funny
• wrote a book
• explained quantum mechanics to masses
• help solve challenger space shuttle diaster 
• 1918-1988

• american astromner 
• leader of cassini spacecraft mission to Saturn
• discovered water on saturns moon
• 1953- 

1. develop a hypothesis 
2. elaborate the consquences of that hypothesis
3. test the hypotesis against an experiment
4. by induction hypothesis can be considered a law

• scattering from big stuff
• scattered by dust particles

Tyndall Scattering

Scatters shorter wavelengths (blue)

scattered by air molecules

measures light going through a substance