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Title:

Our Solar System

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Our Solar System Eclipses occurs when ... the moon Show I ll tell you one thing about the universe ppt first. * I'll tell you one thing about the universe ... – PowerPoint PPT presentation

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Title: Our Solar System


1
Our Solar System
2
I'll tell you one thing about the universe,
though. The universe is a pretty big place. It's
bigger than anything anyone has ever dreamed of
before. So if it's just us... seems like an awful
waste of space. Right?
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Cosmos 2014 Episode 1 Start at 445 1500
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Characteristics
  • our solar system is in the Milky Way galaxy
  • composed of the Sun (yellow dwarf) and everything
    that orbits it
  • sun is 99.8 of the mass
  • Planets 0.135
  • Comets 0.01 ?
  • Satellites 0.00005
  • Minor Planets 0.0000002 ?
  • Meteoroids 0.0000001 ?
  • Suns gravity keeps the planets in orbit
  • around 135 satellites are orbiting the planets in
    our solar system
  • a satellite is an object in orbit around a larger
    mass

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Formation
  • about 4.6 billion years old
  • probably began as a nebula-- a large cloud of
    dust in space
  • collapsed into a large, rotating, disk-shaped
    cloud
  • continued to collapse and the material in the
    middle became hot and dense (the Sun)
  • planets begin to form by accretion where
    particles collide and stick together because of
    gravity

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  • the planets, moons, and asteroids of our solar
    system orbit the Sun in about the same angle
    called the ecliptic plane

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Earths temperature
  • tends to be hotter at the equator because the
    suns energy is perpendicular to the earth and
    therefore more concentrated

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  • Earths seasons are caused by the tilt (23.5º) of
    the earth on its axis
  • the pole tilted towards the sun is hotter and the
    days longer
  • more direct
  • sunlight and
  • higher
  • temperatures

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The Moon
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  • only natural satellite of Earth
  • has no atmosphere
  • gravity is about 1/6 of Earth
  • light comes from the Sun that is reflected off
    the Moon's surface.
  • moons gravity pulls on earths water creating
    high and low tides.

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  • phases of the moon
  • appears to be different shapes depending on its
    position relative to earth
  • waxing is when the moon is getting bigger
  • waning is when the moon is getting smaller

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Eclipses
  • occurs when one object moves into the shadow cast
    by another object
  • solar eclipse
  • moon blocks out the sun from reaching an area on
    earth

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  • lunar eclipse
  • earth blocks the sun from reaching the moon

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