1. The Solar System
11-1

2. Earth-Centered Model
Early Greek scientists thought the planets, the sun, and the moon circled around the Earth.
Everything revolved around the Earth.

3. Dead Guy #1 Nicolas Copernicus
Copernicus - was the 1st to develop the sun-centered model of the solar system.

4. Dead Guy #2 Galileo Galilei
Galileo - found more evidence to support the sun-centered model by using a telescope.

5. Dead Guy #3 Johannes Kepler
Kepler – discovered that the planets orbit was not circular but elliptical.
Speed increases closer to Sun

8. Scale
BIG Universe l
Galaxy
SMALL Solar System

9. Solar System

10. Milky Way Galaxy

11. Formation of Universe Big Bang Theory – Beginning of the Universe
14 billion year old
Explosion of expanding matter

12. Red Shift Hubble space telescope Doppler effect
Spectral lines in light shifted towards the red end of spectrum
Doppler effect
When object moves away from you waves are stretched out 12

13. 13

14. 14

15. 15

16. Formation of the Solar System
Our sun and solar system formed from a cloud of gas, ice, and dust.
Formed 5 billion years ago.
Slowing rotating in space.

17. Solar Nebula
Rotating cloud of dust and gas from which the sun and planets form

18. Solar System Large clumps collided and grew in size.
Larger clumps became planets.

19. Earth’s Rotation Earth spins around an imaginary line called an axis
Rotation – the spinning of Earth on its axis
1 time every 24 hours

20. Rotation Sun appears to be moving in the sky Sun rises in east
Sun sets in west
Causes night and day

22. Earth’s Revolution Orbit – the path of Earth’s movement
Revolution – the path Earth travels as it moves around the Sun
1 year

24. Earth’s Orbit

25. Seasons
Earth’s axis is tilted
The tilt of Earth causes seasons
Why?

26. Seasons Part of Earth tilted towards Sun – more direct sunlight
Summer
Part of Earth tilted away from Sun – less direct sunlight
Winter

27. Seasons Longer days in summer. Sun is higher on horizon.
Spring and Fall?

28. Space Age Sheet

29. Moon Phases Luna Moon revolves around Earth Once every 27.3 days
Moon looks different at different times
WHY?!

30. Moon Phases
Lunar phases are created by changing angles (relative positions) of the earth, the moon and the sun, as the moon orbits the earth.

31. Moon Phases Looks different at different time of the month.
Moon phases – change in appearance of the Moon from Earth

32. Moon Phases Light from Moon is reflected from the Sun
Waxing – looks to be getting larger
Waning – looks to be getting smaller

35. Moon Facts
Dr. Eugene Shoemaker, a Geological Surveyor, who educated the Apollo mission astronauts about craters, never made it into space himself, but it had always been one of his dreams. He was rejected as an astronaut because of medical problems. After he died, his ashes were placed on board the Lunar Prospector spacecraft on January 6, 1999, which was crashed into a crater on the moon on July 31, The mission was to discover if there was water on the moon at the time, but it also served to fulfill Dr Shoemaker's last wish.
When Neil Armstrong took that first historical step and said "That's one small step for man, one giant leap for mankind" it would not have occurred to anyone that the step he took in the dust of the moon was there to stay. It will be there for millions of years because there is no wind on the moon. That is, assuming the downdraft from the Command Module upon takeoff back into space didn't destroy the print. Buzz Aldrin reportedly saw the American flag, much further away, blow over during launch. Nevertheless, any footprints made by the famous astronauts undisturbed by takeoff are, in fact, there to stay.
When Alan Sheppard was on the moon, he hit a golf ball and drove it 2,400 feet, nearly one half a mile.

36. Moon Facts
In a survey conducted in 1988, 13% of those surveyed believed that the moon is made of cheese.
The multi layer space suits worn by the astronauts to the moon weighed 180 pounds on earth, but thirty pounds on the moon due to the lower gravity.
Apollo 15 was the first mission to use a lunar rover. The top speed that was ever recorded in this 4-wheeled land vehicle was miles per hour.
The moon rotates at 10 miles per hour compared to the earth's rotation of 1000 miles per hour.
The dark spots we see on the moon that create the image of the man in the moon are actually craters filled with basalt, which is a very dense material.
The moon is the only extraterrestrial body that has ever been visited by humans. It is also the only body that has had samples taken from it.

37. The Solar System Solar System – made up of 8 planets
Including numerous other objects that orbit the sun

38. Planets
Orbits Sun
Nearly spherical shape

39. Dwarf Planets Do not have more mass than objects it orbits nearby
Rock and ice
Smaller than Earth

40. Measuring Space Astronomical Units – AU’s 150 million km’s
93 million miles
Distance from Earth to Sun

42. Comets Giant dirty snowballs Made of dust and frozen gases Oval orbit
Ice
Oval orbit
Over 100 billion

45. Asteroids
Small rocky objects
Orbit the Sun
Between Mars and Jupiter