AS101 Lecture Notes - Earth Mass, Terrestrial Planet, Oort Cloud
Document Summary
Mass: 333, 000 x mass of earth. Composition: 98% hydrogen and helium, 2 other elements. In 1 second the sun produces a million the total energy used in the us in ne year. Made of metal and rock; large iron core, no atmosphere. Very hot and cold 425 c (day), -170 c (night) Rotates 3 times in every 2 orbits around the sun. Extreme greenhouse effect: hotter than mercury: 470 c, day and night. The only surface liquid water in the solar system. Giant volcanoes, a huge canyon, polar caps etc. Much farther from sun than inner planets. Most h/he; no solid surface (all gas) Many moons: io: active volcanoes al over, europa: possible subsurface ocean, ganymede: largest moon in solar system, calisto: a large, cratered ice ball . Spectacular rings made of ices and rocks. Smaller than jupiter, saturn; much larger than earth. Made of h/he gas & hydrogen compounds. Much smaller than other planets: dwarf planet.
