Introduction to the Solar System PDF

Introduction to the Solar System Copy Me!  Unit Objective ⋆ Predictable phenomena on Earth, including seasons and eclipses, are caused by the relative positions of the sun, Earth and the moon 2 Lesson Objective Success Cri...

Introduction to the Solar System Copy Me!  Unit Objective ⋆ Predictable phenomena on Earth, including seasons and eclipses, are caused by the relative positions of the sun, Earth and the moon 2 Lesson Objective Success Criteria ⋆ Understand the history ⋆ Contrast the geocentric of the development of and heliocentric models the Solar Model of the Solar System ⋆ Understand the ⋆ Identify the components components of the Solar of the Solar System System 3 Copy Me!  History ⋆ In the early stages of scientific history, the geocentric model of the Solar System was created ⋆ Created by the Greeks ⋆ Further designed by Ptolemy; Egyptian astronomer ⋆ Geo- refers to the Earth ⋆ -centric refers to the centre 4 Copy Me! Sourced from 5  History ⋆ Initially, in 3rd century, Aristarchus proposed the heliocentric model; was refuted ⋆ Helio- refers to the Sun ⋆ In 1543, Nicolaus Copernicus once again proposed the heliocentric model; was accepted ⋆ There was sufficient evidence to support his claim and the model was accepted 6 Copy Me! Sourced from 7  Evidence ⋆ The main piece of evidence that allowed Copernicus’ theory to be accepted: ⋆ Fewer assumptions made ⋆ Explained retrograde motion of planets ⋆ Retrograde means to spin in opposite direction 8 Copy Me! 9 Geocentric Vs Heliocentric Model ⋆ Initially, evidence to support the geocentric model included stellar parallax ⋆ Movement of celestial bodies due to position 10 Copy Me! Geocentric Vs Heliocentric Model ⋆ Try this! ⋆ Hold your thumb in front of your face and look at it. Close your right eye and focus with your left. Without moving your focus, close your left eye and open your right eye. Your thumb moved position! Or did it? 11 Geocentric Vs Heliocentric Model ⋆ Distance alters stellar parallax ⋆ This is why the moon seems to follow you at night ⋆ It’s too far away to notice the apparent shift in the Moon’s position 12 Copy Me! Geocentric Vs Heliocentric Model ⋆ However, evidence for the heliocentric model includes: ⋆ Shape of Venus (light reflection and position) ⋆ Moons of Jupiter (natural satellites) ⋆ Sunsets on Mars (angular size of the Sun) 13 Copy Me! Sourced from 14  Heliocentric Evidence ⋆ Shape of Venus (light reflection and position) ⋆ Refers to the shapes seen from the reflected sunlight off the planet surface due to its position ⋆ Moons of Jupiter (natural satellites) ⋆ Observation of natural satellites to other planets that do not directly orbit Earth 15 Copy Me!  Heliocentric Evidence ⋆ Sunsets on Mars (angular size of the sun) ⋆ Observing the sunset on Mars shows that the sun is smaller than on Earth ⋆ Increased distance from the Sun decreases the observed size 16 Copy Me!  Solar System ⋆ A star system contains a home star, planets, asteroids, and comets ⋆ Our Solar System consists of 8 planets, 1 dwarf planet, an asteroid belt and comets 17 Copy Me! 18 Planets in the Solar System ⋆ In order, from the Sun outwards: 1. Mercury 6. Saturn 2. Venus 7. Uranus 3. Earth 8. Neptune 4. Mars 9. Pluto 5. Jupiter 19 Copy Me! 20