ASTR 170B1 Lecture Notes - Lecture 7: Metallic Hydrogen, Jupiter Mass, Smog
30 Sep 2016
School
Department
Course
Professor
Document Summary
Radius: 11 times earth (flattened at poles) Driven by internal heat (convection and rotation) First seen in 1630, little changed since. Thanks to voyager we know the elements. Observations of infrared light: jupiter radiates almost twice the energy it receives from the sun, so jupiter must have internal heat source. Iron and rock core (10-20 times earth"s mass) Space probes found strong field 10 times earh"s. Generated by metallic liquid hydrogen layer and rapid rotation (a. Electrons and protons from sun trapped on magnetic field. At least 63 koons, 1 ring is known. 4 largest seen by galileo (in 1610) Surface: very young, constantly renewed by volcanic outflows. Thin, icy crust, with long complex cracks. Galileo spacecraft found evidence of liquid water ocean under icy crust. Unchanged since end of heavy impact cratering 4 billion years ago. No atmosphere in outer 3 galilean moons.
