GEO 1111 Lecture Notes - Lecture 5: Lunar Mare, Kuiper Belt, Ung County

• School: University of Ottawa
• Department: Geology
• Course: GEO 1111
• Professor: Donald Cummings

Document Summary

How do we get the composition of the solar system: the sun! Composition of terrestrial planets --> ex: earth ! O, fe, mg and si are the big elements! The asteroid belt lies between mars and jupiter : 2- 4 au (astronomical units) between mars and jupiter , only 1 au from earth to the sun , objects are hundreds of thousands apart! Comets: small icy bodies that pass close enough to the sublimate, gen a coma (halo of ice and dust), and in some cases a tail! Escape velocity --> the velocity in which a planet can escape the gravitational pull : the bigger the planet --> the bigger the escape velocity ! Earth was initially molten and mixed ! Includes incompatible elements that dont t well in the core ! Heterogenous vs homogenous accretion : heterogenous --> iron rich meteorites accreted rst, gen the iron rich core , silicate rich meteorites accreted after gen the mantle !