Where is this? ENCELADUS by CASSINI Planetary Sciences

ASTRONOMY 8850: Planetary Sciences Why Sciences? Planetary Sciences

How to do well in Planetary Sciences 1. show up to class … and be present 2. participate in class 3. get/borrow the book Planetary Sciences by de Pater and Lissauer 4. find course website: www.astro.gsu.edu/~thenry/PLANETS 5. find Icarus online 6. choose 3 planetary topic(s) you are most interested in --- start project EARLY 7. do homework --- Solar System Explorers, quiz preparation, etc. 8. NAIL THE SEMESTER PROJECT Planetary Sciences

Grades in Planetary Sciences class participation 10% Solar System Explorers 10% paper Levels 0/1/2/3 20% presentation 20% referee reports (3 colleagues) 20% referee report (Henry) 20% Planetary Sciences

Solar System Explorers 01 Find Icarus online. Choose an article relevant to one of your 3 topics. Print out the first page of the article. Turn in single page (with your name on it) at the beginning of class TUESDAY, January 17. Get 5 points in Solar System Explorers. Planetary Sciences

Solar System Inventory stars planets moons ring systems minor planets Centaurs Trans-Neptunian Objects comets dust 1 8 172a (JPL 2017 JAN 09) 4 (+1?) 729,348 (JPL 2017 JAN 09) 391 (JPL 2017 JAN 09) 2,303 (JPL 2017 JAN 09) 3,444b (JPL 2017 JAN 09) a add 5 for Pluto b any type EAR = 1 … MAR = 2 … JUP = 67 … SAT = 61 … URA = 27 … NEP = 14 … PLU = 5 via JPL 2015 JAN 12: 670,480 minor planets 295 Centaurs 1644 TNOs 3319 comets Planetary Sciences

Nomenclature terrestrials Mercury, Venus, Earth, Mars many moons jovians gas giants Jupiter, Saturn ice giants Uranus, Neptune minor planets asteroids Main Belt Near-Earth Objects (NEOs) Trojans (and Greeks and Hildas) Trans-Neptunian Objects (TNOs) Plutinos (Classical) Kuiper Belt Objects (KBOs) Centaurs Scattered Disk Objects (SDOs) comets Jupiter-family, Chiron-type, Halley-type … Planetary Sciences

Solar Family How are they different? Planetary Sciences

Jovians and Terrestrials Planetary Sciences

Planet Spacing Planetary Sciences

Planet Orbits Planetary Sciences Planetary Sciences

The 7 Dwarfs (+ interlopers) X X X Planetary Sciences

Terrestrial Planet Surface Planetary Sciences

Surface Variability Planetary Sciences Planetary Sciences

Jovian Planet “Surface” Planetary Sciences

…we can land/work on surfaces Planetary Sciences Planetary Sciences

………………………… Planetary Sciences