Illustrate/ Draw model:

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Illustrate/ Draw model
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Heliocentric (Copernican) System

• The word "helios" in Greek means "sun."
  Heliocentric means that the sun is at the center.
  A heliocentric system is one in which the planets
  revolve around a fixed sun.

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Helio- continued

• Thus Mercury, Venus, the Earth, Mars, Jupiter and
  Saturn all revolve around the sun. The moon is
  the only celestial sphere in this system which
  revolves around the earth, and, together with it,
  around the sun.

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Heliocentric (Copernican) System

• Sun at center (heliocentric)
• Uniform, circular motion
• No epicycles (almost)
• Moon orbited the earth, the earth orbited the
  sun as another planet

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Heliocentric (Copernican) System

• Planets and stars still on fixed spheres, stars
  dont move
• The daily motion of the stars results from the
  Earths spin
• The annual motion of the stars results from the
  Earths orbit

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Please Illustrate/ Pick one!
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Our Solar System

• Our solar system is made up of
• Sun
• Nine planets
• Their moons
• Asteroids
• Comets
• Meteoros

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Inner Planets

• The inner four rocky / Terrestrial planets. These
  planets have hard rock crusts, and dense rock and
  metal cores are
• Mercury
• Venus
• Earth
• Mars

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Mercury

• Mercury is the closest planet to the Sun.
• Mercury rotates the Sun in only 88 days.
• Mercury rotates very slowly on its axis with one
  day taking 58 Earth days.
• Mercury barely has any atmosphere, but does have
  glaciers.
• Called a morning star. This is because Mercury
  shines brightly in the early morning just before
  the sun rises. It has also been called an evening
  star for the same reason. Mercury is often
  visible for a brief period of time just after the
  Sun sets.

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Venus

• Sister planet to Earth Size and structure is VERY
  similar to Earth, often called "Earth's Twin"
• Has no moons or rings
• Hot, thick atmosphere
• Brightest object in sky besides sun and moon
  (looks like bright star)
• Covered with craters, volcanoes, and mountains

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Earth

• Third planet from sun
• Only planet known to have life and liquid water
• Atmosphere composed of composed of Nitrogen
  (78), Oxygen (21), and other gases (1).

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Mars

• Fourth planet from sun
• Appears as bright reddish color in the night sky
  Called "the Red Planet" because it surface is
  covered with iron oxide- RUST! Proves that Mars
  once had free oxygen molecules in its atmosphere.
• Surface features volcanoes and huge dust storms
• Has 2 moons Phobos and Deimos

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Outer Planets

• A gas giant (sometimes also known as a jovian
  planet after the planet Jupiter, or giant planet)
  is a massive planet with a thick atmosphere of
  hydrogen and helium
• Jupiter
• Saturn
• Uranus
• Neptune

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Jupiter

• Largest planet in solar system
• Brightest planet in sky
• 60 moons, 5 visible from Earth
• Strong magnetic field
• Giant red spot
• Rings have 3 parts Halo Ring, Main Ring,
  Gossamer Ring

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Saturn

• 6th planet from sun
• Seven thin, flat rings not solid but made up of
  particles of ice, dust and rocks
• 31 moons
• Largest moon, Titan,
• Easily visible in the night sky
• A lightweight planet and it spins so fast
• Voyager explored Saturn and its rings.

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Uranus

• 7th planet from sun
• Has a faint ring system
• 27 known moons
• Covered with clouds
• Sits and spins on its side with the north and
  south poles sticking out the sides.

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Neptune

• 8th planet from sun
• Discovered through math
• 7 known moons
• Triton largest moon
• Storm called the "Great Dark Spot" because it
  appears as a dark oval shape on the surface of
  the planet.
• Great Dark Spot thought to be a hole, similar to
  the hole in the ozone layer on Earth

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Pluto our dwarf

• Pluto, the outermost planet, is a small, icy
  "dwarf planet it is smaller than the Earth's
  Moon.

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Pluto

• 9th planet from sun (usually)
• Never visited by spacecraft
• Orbits very slowly
• Moon, Charon, is very close to Pluto and about
  the same size

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• Comet- chunks of ice and dust

• Has an elliptical orbit around Sun
• Has a head (nucleus and coma) and tail.
• Tail always points away from sun.

Draw and label this picture!
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Comets Orbit
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Asteroids-

• Larger chunks of rock
• Vary in size and shape
• In Asteroid Belt between Mars and Jupiter
• Revolve around sun in 3-6 years

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Asteroids Illustrate /draw
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• Meteoroids- smaller chunks of rock and dust in
  space.
• 1. randomly move about space no
  specific orbit
• 2. come from remains of comets and
  asteroids

• Meteor- a meteoroid that burns in the atmosphere-
  produces a streak of light.
• nickname Shooting star

• MeteoriTe- a meteoroid that doesnt burn up in
  the Earths atmosphere. It Touches Earth.

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