01:750:109 Lecture Notes - Lecture 1: Minute And Second Of Arc, Sesame, Cosmic Calendar
Document Summary
Ph 109 - astronomy & cosmology solar systems: past and present . Images of saturn"s rings from the inside looking out taken by nasa"s cassini spacecraft on. The surrounding animation indicates the location of the spacecraft during the sequence. How did it get that way: large distances and sizes make it impossible for us to alter the universe to do. Is primarily an observational science rather than an experimental one. The reason: it is difficult to resolve much detail on the other planets with. In the model 1 meter = 6 million km (a long step). Nearest star (cid:885)(cid:890)(cid:886),(cid:882)(cid:882)(cid:882) (cid:886)(cid:882)(cid:882)(cid:882) =(cid:891)(cid:889) (cid:1858)(cid:1870)(cid:1872) (cid:1857)(cid:1870) (cid:891)(cid:889) (cid:887)(cid:882) (cid:1856)(cid:1871)=(cid:886)(cid:890)(cid:887)(cid:882) (cid:1856)(cid:1871)=(cid:883)(cid:885). (cid:885) (cid:1857)(cid:1870)(cid:1871) (cid:883)(cid:887)(cid:882),(cid:882)(cid:882)(cid:882),(cid:882)(cid:882)(cid:882) =(cid:883). (cid:887) (cid:883)(cid:882)8. Speed of light = 300,000 km/s (1. 4 million x faster than a jet) The scale of the solar system: on a 1-to-10- billion scale, the sun is the size of a large grapefruit (14 cm), earth is the size of a ball point, 15 meters away.
