The Position of Our Solar System

1
The Position of Our Solar System

• Terms
• Light year
• Astronomical Unit (AU)
• Inner Planets
• Outer Planets
• Heliocentric theory
• Geocentric Theory

2
Cornell Notes S6E1.c Compare and contrast the
planets in terms of relative distance from the
sun

• How are distances measured in the solar system
  and the universe?
• What is the order of the planets? How are the
  planets classified?
• How have our ideas about the solar system changed
  over time? Who contributed to these ideas?

3

• 778,000,000
• What do you think this number means?
• money?
• People?
• Baseball players salary?
• Hair on your head?

4

• 778,000,000 kilometers
• is the distance from the
• sun to Jupiter!
• Do the activity Miss Stein

5

• 1 meter 150,000,000km
• EX 378,000,000 km 2.8
• 150,000,000
• You need 2.8 meters

6
Measuring Space

• A light year is the distance light travels in 1
  year ? it is approximately 9.5 trillion
  kilometers
• An Astronomical Unit (AU) is the average distance
  between Earth and the sun ? one AU is
  approximately 150,000,000 kilometers

7
(No Transcript)
8

• The planets that are much closer to the sun are
  classified as inner planets Mercury, Venus,
  Earth, Mars
• Inner planets have rocky, dense
  surfaces.terrestrial planets
• The planets that are much farther from the sun
  are classified as outer planets Jupiter, Saturn,
  Uranus, Neptune
• Outer planets are larger and composed of gas.
  Gas giants
• Pluto is a dwarf planet it is not included in
  the outer planets group because it has different
  characteristics

9
Geocentric Theory
What does the prefix geo- mean? What does
centric mean? What do you think geocentric
means?
10
Geocentric theory

• Geocentric means earth centered.
• A long time ago people thought Earth was the
  center of our solar system and everything
  revolved around it

11
Heliocentric Theory

• What does the prefix helio- mean?
• What do you think heliocentric means?

12
Heliocentric Theory

• Heliocentric means sun centered
• Copernicus was the first person to suggest that
  the sun was the center of the solar system
• Galileo used telescopes to make observations
  that the sun was the center of the solar system

13
Quick Check

• What is an AU?
• The distance across the solar system
• The average distance from the sun to Earth
• The distance light travels in a year
• 10,000,000 kilometers

14
Quick Check

• Which planets in the solar system are called the
  gas giants?
• Mercury, Venus, Earth, Mars
• Saturn, Uranus, Neptune, Pluto
• Jupiter, Saturn, Uranus, Neptune
• Earth, Venus, Pluto, Mars

15
Quick Check

• Which is the current and correct model of our
  solar system?
• The Big Bang Theory
• The Geocentric Theory
• The Pythagorean Theory
• The Heliocentric Theory

16
Quick Check

• Who was the person that made observations to
  support the Heliocentric Theory?
• Galileo
• Capernicus
• Isaac Newton
• Ms. Stein