1. Planet Notes

2. Introduction
Our solar system formed from a swirling cloud of gas and dust.
The sun -made from the densest matter that became very hot and started to produce its energy by nuclear fusion.

3. Introduction
The remaining matter continued swirling around the sun because of the sun’s gravity and eventually clumped together to make solid forms =planets, moon, and other objects of space.

4. The Planets In order from the sun- Mercury; Venus; Earth; Mars (inner)
Jupiter; Saturn; Uranus; Neptune (outer)

5. The Planets Mnemonic Device
A silly sentence to help you remember the order of the planets
My Mercury
Very Venus
Educated Earth
Mother Mars
Just Jupiter
Served Saturn
Us Uranus
Nachos Neptune

6. INNER PLANETS Mercury, Venus, Earth and Mars.
Terrestrial means “Earth-like”
All have rocky surfaces like Earth.

7. MERCURY Closest to the Sun. Thin to no atmosphere “planet of extremes”
temps range: -170C to 425C
No moons

8. VENUS Earth’s twin Greenhouse effect “Evening star”
Retrograde rotation- spins East to West
Carbon dioxide; thick atmosphere
No moons

9. EARTH 70% water Atmosphere -mostly Nitrogen Rotates West to East
1 moon
3rd from the sun

10. MARS “Red Planet” Ice Caps Thin atmosphere -mostly Carbon Dioxide
2 moons- Phobos, Deimos
Axis is tilted & has seasons like Earth.

11. OUTER PLANETS Jupiter, Saturn, Uranus, and Neptune. “Gas giants”
All have gaseous atmospheres/surfaces.
Have rings. Some rings are more visible than others.

12. JUPITER Largest of all planets
Has a “Great Red Spot”- storm of swirling high-pressure gas
Faint rings.
4 well-known moons- Io, Callisto, Ganymede, Europa

13. SATURN visible rings made of ice, dust, and rock. 2nd largest planet
Less dense than water (would float in water)
Largest moon (Titan)- is bigger than Mercury

14. URANUS Methane Atmosphere Bluish in color
Rotates from top to bottom (like a tire)
Faint rings that surround the planet vertically (up and down)

15. NEPTUNE Atmosphere has very visible clouds. Has a “great dark spot”
Has Faint rings
Last planet
8th from the sun