1. ______ spent 20 years plotting the locations of the planets?

a. Kepler c. Newtonb. Brahe d. Galileo

2. Using Tycho Brahe’s data, ________ proposed three laws of planetary motion?

a. Newton c. Galileob. Copernicus d. Kepler

3. The first early astronomer to propose a sun-centered solar system was ____.

a. Copernicus c. Newtonb. Brahe d. Galileo

Warm-up Week 15 Day 1

“Earth, Moon, & Sun”

22.2

Everything moves!

Earth.

Moon.

Sun.

Galaxies.

Motion of Earth

• R______– Day / Night

• R________– Seasons / Year

• Precession– “Wobble”

otation

evolution

Perihelion

• Close

Aphelion

• Far

Revolution.

Earth’s Axis

• 23.5o

• Seasons– Distance to sun.

Earth / Moon System

• Phases of Moon

Apogee Perigee

Moon Phases

• Sunlight reflected off surface.

• Depends on your location!

Lunar Motion

• Rotation = 27.3 days• Revolution = 27.3 days• We never see the “dark side” of the moon!

Eclipses

• Shadows.

• Solar Eclipse.– Moon’s in the way

• Lunar Eclipse.– Earth’s in the way

…?

Solar Eclipse

Moon is sneaking between Sun & Earth.

What’s goin’ on here?!

Earth is sneaking between moon & sun.

Lunar Eclipse

• Sunlight is bent by Earth's atm.

• All the world's sunrises and sunsets ringing the globe at the time.

Lunar Eclipse

Taboo.Directions:1. One person is “coach.”

2. Coach tries to get others in group to say the word.

3. Coach gives clues, but cannot say the words in the list.

4. Person with most points wins.

5. Everyone else gives this person their lunch money.