1. The “New” Solar System

2. Guess who has become the new dwarf!!!

3. What is a Planet? (IAU) International Astronomical Union
A "planet" is an object that:
(a) orbits the Sun,
(b) has mass and gravity to form a sphere, and
*(c) has “gravitational control of all nearby objects”

5. Our 3 dwarf planets
Pluto
Eris
Ceres

6. PLUTO
Moons: 3 (2 new)

7. Inner Planets
O U T E R P L A N E T S
Jupiter
Saturn
Uranus
Neptune

8. Characteristics of terretrial and JOVIAN planets
Go to your book Chapter 29 (p. 594)
Do objectives

9. Terrestrial vs. JOVIAN Terrestrial:
Any one of the four planets closest to the sun
Mercury
Venus
Earth
Mars
With properties similar to those of earth.
ROCKY with a metal core

10. Terrestrial vs. JOVIAN JOVIAN: Any one of the four outer planets
Jupiter
Saturn
Uranus
Neptune
With properties including MASSIVE in size, low density, thick atmosphere made up mostly of H and He gases.

11. Pluto’s newest moons

12. Eris Very elliptical orbit (beyond Pluto) Revolution = 560 yrs
One moon (Dysnomia)

13. How do we see these??
Keck Telescope, Hawaii
The Largest Optical Telescope

14. Ceres Formerly an asteroid Located between Mars & Jupiter
Smallest dwarf planet

15. Potential Dwarf Planets
Mostly KBO’s (Kuiper Belt Objects)
Sedna
Quaoar
2005 FY9
2003 EL61

16. Size Comparison