Astronomy 2021A/B Lecture Notes - Lecture 9: Tidal Acceleration, Galilean Moons, Ice Ice Baby

• School: Western University
• Department: Astronomy
• Course: Astronomy 2021A/B
• Professor: Alyssa Gilbert

Document Summary

9. 1 the moons of the outer solar system. Remember jovian planets are the 4 furthest ones from the sun (the gassy ones) whereas the 4 close ones are called terrestrials. The 4 jovian planets have at least 165 moons between them. Discovering the moons: galileo found the first stars- he heard about the telescope and made his own, pointing it in the sky and seeing two close objects around jupiter. He looked again the next day and they moved relative to the pla(cid:374)et. E(cid:448)e(cid:374)tuall(cid:455) he (cid:396)ealized the fou(cid:396) (cid:862)sta(cid:396)s(cid:863) (cid:894)he thought the(cid:455) (cid:449)e(cid:396)e sta(cid:396)s(cid:895) al(cid:449)a(cid:455)s sta(cid:455)ed (cid:272)lose to. Jupiter, and compared it to venus and mercury to the sun (orbiting around it). These are called the galileanmoons of jupiter, aka io, europa, gnaymede and callisto: dut(cid:272)h s(cid:272)ie(cid:374)tist ch(cid:396)istiaa(cid:374) hu(cid:455)ge(cid:374)s dis(cid:272)o(cid:448)e(cid:396)ed tita(cid:374), la(cid:396)gest of atu(cid:396)(cid:374)"s (cid:373)oo(cid:374)s, giovanni domenico cassini discovered 4 moons around saturn. Sizes and orbits of the moons: all different shapes and sizes.