Jupiter emits 2x as much heat as it receives from the Sun. Still radiating heat from gravitational collapse since heat is trapped in by atmosphere. Magnetic field over 10x as strong as Earth's Jupiter surrounded by charged particles that move along B field lines. Sort of like Earth's aurorae but far more intense. Because of this we need to shield spacecraft going to Jupiter.
Most particles are tiny - dust specks.
3 Information contained on this page does not represent the lecture verbatim. These notes are not a substitute for class attendance.