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Transcript
Chapter 8 Survey of Solar Systems The solar system formed from a cloud of cold gas and dust called the solar nebula about 4.6 billion years ago The planets in out Solar System were formed from countless impacts Moon Mercury Asteroids 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! There is still minor debris left over from the formation of the solar system 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 Icy Comets – found in the outer parts of the solar system Dwarf Planets- orbit the Sun, nearly round shape, not a planet, star or moon Protoplanetary Disks New solar systems in formation! Exoplanets Planets that have been detected orbiting other stars!!! 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 Exoplanets in other solar systems detected by the Stellar Wobble method A real life Tatooine! KEPLER 2009 Detection of Exoplanets: Planetary Transit Method One of a few images of an exoplanet around a star Future Discovery Methods Canceled Terrestrial Planet Finder (2014, 2020)
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