1. The Inner Planets

2. The Inner Planets are:  Small: Compared to the Outer Planets  Rocky: Rocky surface – thin atmosphere  Dense: Heavy for their size

3. Inner Planets – Terrestrial Planets  The Inner Planets are also called the Terrestrial Planets Terrestrial Planets

4. Mercury Smallest Inner Planet Smallest Inner Planet Thin Atmosphere – Sodium Thin Atmosphere – Sodium Day: 59 Earth days (rotation) Day: 59 Earth days (rotation) Year: 88 Earth days (revolution) Year: 88 Earth days (revolution) Temp: Day: 425 deg. Celsius Temp: Day: 425 deg. Celsius Night: -180 deg. Celsius Night: -180 deg. Celsius Mariner 10 space probe Mariner 10 space probe Messenger (2009) Messenger (2009) No Moons No Moons Many craters…. Many craters….

5. Mercury

6. Venus About the same size as earth About the same size as earth Many clouds-sulfuric acid Many clouds-sulfuric acid High Temp.-Greenhouse effect High Temp.-Greenhouse effect >450 deg. Celsius >450 deg. Celsius Carbon dioxide atmosphere Carbon dioxide atmosphere Volcanoes Volcanoes Retrograde Rotation: backwards Retrograde Rotation: backwards No Moons No Moons Day:243 earth days Day:243 earth days Year: 225 earth days Year: 225 earth days Magellan probe mapped surface Magellan probe mapped surface

7. Venus

8. Earth The only planet with a lot of liquid water. The only planet with a lot of liquid water. Active Planet Active Planet weather-volcanoes-earthquakes weather-volcanoes-earthquakes Atmosphere: Nitrogen-oxygen Atmosphere: Nitrogen-oxygen 1 large Moon 1 large Moon Day: 24 hours Day: 24 hours Year: 365 ¼ days Year: 365 ¼ days

9. Earth

10. Mars The Red Planet-rust in the soil The Red Planet-rust in the soil Polar ice caps Polar ice caps 2 Moons – Phobos, Deimos 2 Moons – Phobos, Deimos Largest Volcano-Olympus Mons Largest Volcano-Olympus Mons Many non-active volcanoes Many non-active volcanoes Viking-pathfinder-spirit-opportunity Viking-pathfinder-spirit-opportunity ½ the size of earth- ½ gravity ½ the size of earth- ½ gravity Day: 24.5 hours Day: 24.5 hours Year: 688 earth days Year: 688 earth days Temp: -57 deg. Celsius Temp: -57 deg. Celsius Atmosphere: Thin-carbon dioxide Atmosphere: Thin-carbon dioxide

11. Mars

12. Mercury  From Mariner  Mercury transits the Sun

13. Venus  From Magellan  Brightest object after the Sun and the Moon

14. Earth  From Space  At Night

15. Mars

16. Mars  Face on Mars….before and after