1. Planets & Dwarf Planets
The Solar System
Planets & Dwarf Planets

2. Solar System
the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
AKA: anything that orbits the sun is part of the solar system

3. According to this theory, our own solar system formed about 4
According to this theory, our own solar system formed about 4.6 billion years ago, and others are forming today in distant nebulae.

4. The planets Terrestrial/Rocky/Inner “Earth-Like”
Mercury, Venus, Earth, Mars
Made of solid rock
Have few or no moons
Small
Short orbital period

5. Jovian/Gas Giants/Outer “Jupiter-Like”
Jupiter, Saturn, Uranus, Neptune
Made of gas
Have many moons
Have rings
Large
Long orbital period

6. The Solar System
You must know the order of the planets

7. Dwarf Planets
a celestial body orbiting a star that is massive enough to be rounded by its own gravity but has not cleared its neighboring region of planetesimals and is not a satellite. 
AKA: it is not a moon (it does not orbit another planet), but its orbit intersects the orbit of another planet
The first five recognized dwarf planets are Ceres, Pluto, Eris, Makemake and Haumea.

8. Things to ponder…
Is Pluto always the farthest “planet” from the sun?

10. To Do: Solar System Trading Cards Game Solar System Spacing
Learn more about each of the planets
Solar System Spacing
Learn just how vast the solar system really is!

11. Smaller Members of the Solar System
Asteroids
Comets
Meteoroids, Meteors, and Meteorites

12. Asteroids
Asteroids are rocky and metallic objects that orbit the Sun but are too small to be considered planets. They are known as minor planets.
Asteroids are material left over from the formation of the solar system.
Most likely, asteroids are material that never coalesced into a planet

14. Asteroid Belt
Most asteroids lie between the orbits of Mars and Jupiter (3-6 year orbital periods)

15. Comets dirty snowballs or "icy mudballs“
Rocky and metallic materials held together by ices (both water and frozen gases) and dust
Extremely elliptical orbits (long orbital periods)

16. Parts of a Comet *glue-able slide

17. A Comet’s Tail
Always points away from the Sun

18. Where do comets come from?
Kuiper Belt:
Short period comets
Oort Cloud:
Long period comets

20. Halley’s Comet Short period comet Last passed by in 1986
Orbital period = 76 years
Last passed by in 1986
When will the next pass be?
How old will you be?

21. Meteoroids, Meteors, and Meteorites
Meteoroids (in space)
The smallest particles orbiting the sun, most are no larger than grains of sand
Meteors (in the atmosphere/ shooting stars)
Meteoroids that enter Earth's atmosphere.
Meteorites (on the ground)
Meteors that do not burn up in the atmosphere and impact Earth’s surface

22. Meteorites
Meteors that do not burn up in the atmosphere and impact Earth’s surface
Leave impact craters
Barringer Crater, Arizona

23. Extinction of the Dinosaurs?

24. To Do: 23.4 Assessment on page 664 Restate the question.
Write in complete sentences.