The solar system formed from a a cloud of cold gas and dust called the solar nebula about ________ ___________ years ago
Inner planets are vastly different than outer planets in terms of sizes, masses, and densities
There is still minor debris left over from the formation of the solar system Rocky __________ - mostly found between the orbits of Mars and Jupiter
There is still minor debris left over from the formation of the solar system Icy _______ – found in the outer parts of the solar system
____________- orbits the Sun, nearly round shape, not a planet, star or moon
__________________ Disks New solar systems in formation!
Extra-Solar Planets • planets too faint to be detected • directly • so must detect them indirectly • by observing a __________ • ____________ • stellar wobble due to __________ • of the planet • 1990s, used _____________ to detect planets Planets have been detected around other stars!!!
Discovery Methods KEPLER ~ 2009 Nasa’s Space Interferometry Mission (2011) Terrestrial Planet Finder (2014, 2020)