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A look at Our Solar System

A look at Our Solar System. It all starts with …. ARISTOTLE. GEOCENTRIC MODEL – everything revolves around earth. Ptolomy – Orbits were Perfect circles. Nicolaus Copernicus. Heliocentric model – all planets revolve around the sun. He’s back – Issac Newton.

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A look at Our Solar System

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  1. A look at Our Solar System

  2. It all starts with ….. ARISTOTLE

  3. GEOCENTRIC MODEL – everything revolves around earth.

  4. Ptolomy – Orbits were Perfect circles.

  5. Nicolaus Copernicus

  6. Heliocentric model – all planets revolve around the sun

  7. He’s back – Issac Newton

  8. Gravitational forces keep planets in an orbit around the sun.

  9. It all started about 4.6 billion years ago…. At least that’s what we think

  10. The Nebular Model Remember – a nebula is a large cloud of dust and gas in space. It is where stars are born or where they explode at the end of their lives

  11. Nebula begins to collapse Begins to rotate and flatten Accreation- collision of particles - occurs in the disk. Planets form.

  12. The TERRESTRIAL PLANETS are the ones closer to the sun. Since they were close to the sun, gas and dust did not join together easily. Intense radiation from the sun exerted pressure on these planets, and cause them to loose their lighter materials. GAS GIANTS formed farther away from the sun, where gas and dust joined easily. These planets were LARGE enough and COLD enough to hold light nebular gases, such as hydrogen and helium in their atmospheres.

  13. Inner planets in our solar system are called TERRESTRIAL PLANETS Rocky like earth Have higher temperatures, because they receive more of the sun’s radiation. The distance in the solar system is measured in astrological units (au) or the distance from the sun to the earth.

  14. MERCURY The closest planet to the sun Temperature extremes. Can go from 670 Kelvin to 103 Kelvin at night Spin slowly on it’s axis. I day on Mercury equals 176 earth days.

  15. VENUS Covered in thick carbon dioxide clouds. Causes a runaway greenhouse effect. The surface temperature is over 700 Kelvin Its atmosphere contains large amounts of sulfuric acid. One day equals 117 earth days

  16. Earth Two things allow life to exist Hydrosphere – all the water on the earth’s surface The atmosphere – made of mostly nitrogen, it helps moderate temperature, and protects against uv radiation and space debris

  17. MARS Surface is red from iron oxide Frozen carbon dioxide polar ice caps Home to the largest volcano in the solar system Feature indicate water may have once been present

  18. GAS GIANTS Larger outer planets Separated from terrestrial planets by an asteroid belt No solid surface, thick gaseous atmospheres All have rings and satellites

  19. JUPITER Atmosphere consists of swirling clouds of hydrogen, helium, methane, and ammonia Largest planet in the solar system Giant Red Spot is a huge hurricane which measures over 2 earth diameters wide.

  20. SATURN Spectacular system of rings It radiates 3 times more energy than it receives from the sun, so it may still be forming

  21. URANUS AND NEPTUNE Similar in size to one another. Blue color is due to methane gas in their atmosphere.

  22. PLUTO 1930 – 2011 RIP

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