Chapter 8 Survey of Solar Systems

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Chapter 8Survey of Solar Systems
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The solar system formed from a cloud of cold gas
and dust called the solar nebula about 4.6
billion years ago
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The planets in out Solar System were formed from
countless impacts

• Moon Mercury
  Asteroids

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Inner planets are vastly different than outer
planets in terms of sizes, masses, and densities
Most Voyagers Entering Mars Journey Serenely
Until Nightfall
My Very Enormous Martian Just Swallowed Up
Neptune!
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Rocky Asteroids - mostly found between the orbits
of Mars and Jupiter
There is still minor debris left over from the
formation of the solar system
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Icy Comets found in the outer parts of the
solar system
There is still minor debris left over from the
formation of the solar system
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Dwarf Planets- orbit the Sun, nearly round shape,
not a planet, star or moon
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Protoplanetary Disks
New solar systems in formation!
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Exoplanets
Planets that have been detected orbiting other
stars!!!
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Detection of Exoplanets Stellar Wobble Method

• gravity of the planet causes
• the star to wobble back
• and forth
• 1990s, used Doppler effect
• to detect stellar wobbles

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Exoplanetsin other solar systems detected by
the Stellar Wobble method
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A real life Tatooine!
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Detection of Exoplanets Planetary Transit
Method
KEPLER 2009
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One of a few images of an exoplanet around a star
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Future Discovery Methods Canceled
Terrestrial Planet Finder (2014, 2020)