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Solar System

Solar System. edplace.com. Solar Family. The Earth is part of a solar system. 1 star – the Sun 8 planets Dwarf planets Smaller objects. The Sun, Moon, and five planets were known before the telescope. There are over 400,000 known objects today. Orbital Map.

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Solar System

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  1. Solar System edplace.com

  2. Solar Family • The Earth is part of a solar system. • 1 star – the Sun • 8 planets • Dwarf planets • Smaller objects • The Sun, Moon, and five planets were known before the telescope. • There are over 400,000 known objects today.

  3. Orbital Map • Kepler’s laws set the relative sizes of the orbits from the period. • Transit of Venus for scale • Now precision radar • The Earth is part of the inner solar system. • Mercury 88 day period • Mars 687 day period

  4. Outer Reaches • Most objects are in the outer solar system. • The solar system is 100’s of times larger than Earth’s orbit. • Jupiter 12 year period (5.2 AU) • Eris 560 year period (98 AU)

  5. Size • Planet size is determined by measuring the angular width. • Compare to distance • Mass from gravity on other objects • Planets are small compared to the Sun. • Earth 1/100 Sun • Jupiter 1/10 Sun

  6. Terrestrial • Planets in the inner solar system have a lot in common with Earth. • Rocks and iron • Solid surface • Atmosphere • Terrestrial comes from the Latin word for Earth. • There are major differences among terrestrial planets. • Different atmospheres • Cratered surfaces • Rotation rates • Magnetic fields

  7. Jovian • Planets in the outer solar system have a lot in common with Jupiter. • Jovian is from another Roman word for Jupiter. • Jovian planets have major differences with terrestrials. • Large mass • Large size • Mostly gas, no surface • Low density • Fast rotation • Many moons

  8. Interplanetary Debris • The remainder of the solar system is made up of small bodies. • Different types: rocky, icy • The sizes range from dust to dwarf planets. NASA

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