GEOG 1400 Chapter Notes -Hydrosphere, Nitrogen Cycle, Sensible Heat
Document Summary
Unit 1 earth"s setting in space (47-63) Light year- the distance travelled by a pulse of light in one year : 9. 46 trillion km. Universe the entity that contains all matter and energy that exists anywhere in space and time. Milky way- an organized disk-like assemblage of billions of stars. Sun: located at the centre of the solar system, source of light heat and overall gravitational field that sustains planets, sun"s gravitational pull is powerful enough to control the movements of a planet nearly. Composed mainly superheated hydrogen and helium gases: solar wind- most of that gaseous flow of energy. Planets: all planets except neptune are bright enough to be seen in the night skies without telescope. Mercury, venus, earth, mars - terrestrial earth-like : outer planets. Differ from their inner solar system counterparts. Major planets or jovian planets- all resemble gaint, prototypical jupitar because they account for over 99% of all mater of the solar system.
