ASTR 101 Lecture Notes - Lecture 35: Water Balloon, Metallic Hydrogen, Shepherd Moons

• School: Queen's University
• Department: Physics, Engineering Physics and Astronomy
• Course: ASTR 101
• Professor: Majd Abdelqader

Document Summary

All discovered at different times with telescopes. When you know mass and size you can find average density. There was enough data to have estimates of the sizes and masses. With this you can find the average density. The density for these planets is much smaller. Something must be very different about them. True understanding is in the last 50 years. Spacecraft gave orbited and dove into these planets. Jupiter and saturn: mostly h and he gas. Uranus and neptune: mostly h compounds: water, methane, and ammonia, some h, he, and rock. Uranus and neptune are denser than saturn because they have less h and he, proportionately. But that e(cid:454)pla(cid:374)atio(cid:374) does(cid:374)"t (cid:449)o(cid:396)k fo(cid:396) jupite(cid:396) . Trying to stack pillow on tip of each other. The more pillow you stack to more you are crushing this ones at the bottom. Three becomes a point where when you add a new pillow the tower doesn"t get highe(cid:396)