Make a Name Tag• Make a name tag (folded hotdog

style)• Personalize your name tag with

symbols and pictures that represent you

• I will keep these on my cart every day

• They will be used to form groups/seating charts, to call on people, etc.

Section 2.1(Assigned on Monday)

Ancient Astronomy Development• Major driving force was

practicality• Navigation• Seasons• Timekeeping

• Ex. Stonehenge, Big Horn Medicine Wheel, Caracol Temple, Sundaggar, etc.

Stonehenge3,000BC to 2,000BC

https://www.youtube.com/watch?v=-6oxmxPKoSE

https://www.youtube.com/watch?v=_n2QNHN72wA

Unit 2.2(Assigned Tuesday)

Cosmology- The science of the origin and development of the universe.

Greeks• The universe did not go farther than the

Solar System. – Earth, Sun, Moon• The model was literal to what we

observe on Earth. • We do not feel the earth move, Sun

looks like it is revolving around us, etc.

• Geocentric- “Earth-centered”

Geocentric Model

• However, the planets did not move regularly. This model could not explain this phenomenon.

Retrograde Motion

https://www.youtube.com/watch?v=kbynKfNfHk4

Planet= Wanderer

Planets seem to form a loop, or “wander” in the sky

Ptolemy’s- Geocentric Model

Accounted for Retrograde Motion with the use of “epicycles”

https://www.youtube.com/watch?v=utH-GHH1FT8

Downfall of Ptolemy’s Model

The model was too complicated-

“In the physical sciences, simplicity has so often proved to be an indicator of truth.”

Example- telling a lie vs. telling the truth

Section 2.3(assigned Wednesday)

The Heliocentric Model- “Sun-centered”

Nicolas Copernicus

Not the first person to think of the Heliocentric model (Aristarchus of Samos- 320BC), but refined the model

His heliocentric model was simpler than Ptolemy’s while still accounting for retrograde motion

Copernicus-Retrograde Motion

If Earth moves faster than Mars in orbit, then Earth will eventually “overtakes” Mars. Mars will then appear to move backward

Examples?

https://www.youtube.com/watch?v=kbynKfNfHk4

Apparent looping motions (vs. Real looping motions (Ptloemy)

Copernican Revolution

“The critical realization that Earth is not at the center of our universe” - Text Book

Why is this a “critical realization?”

Not accepted for 200+ yearsNot enough data to convince Catholic Church

Copernican Revolution/Scientific Revolution

Tycho Brahe: Collected VERY accurate Data

Johannes Kepler:Assistant to Brahe: used data to develop laws of planetary motion

Franics Bacon: Developed Scientific Method

Galileo GaliliFirst to use the telescope to study the stars, used observations to support Copernican Model