1. Solar System

2. Inner Planets
Terrestrial planets – The four closest planets to the sun. (The rock planets)
- Mercury
- Venus
- Earth
- Mars

3. Mercury Closest to the sun Thin atmosphere (craters)
Temperature range (427°C to -173°C)

4. MERCURY

5. Venus Second closest planet to the sun Earth’s twin
Day (243) is longer than its year (225)
Very dense atmosphere of Carbon Dioxide
90 times the atmospheric pressure of Earth
Hot surface (464°C)
Tilt 177° Retrograde motion

6. Earth

7. Mars Fourth planet from the sun
Atmospheric pressure to low for water to exist, however frozen at poles
Temperatures 20°C at poles, -130°C at poles
Olympus Mons (600/24)
Valles Marineris (u.s.)

12. MARS

14. Outer Planets
Jovian planets (The Gaseous planets) – The four farthest planets from the sun.
Jupiter
Saturn
Uranus
Neptune

15. Jupiter The largest of the planets Orbits every 12 years
Rotates faster than any planet – 9 hours 50 minutes
92 % of planet is Hydrogen & Helium

16. THE GREAT RED SPOT
(2 times the size of earth)
540km/hr

17. Saturn Second largest planet in our solar system
Rings of ice and rock Orbital period 29.5 years
Rotates every 10 hours and 30 minutes
30+ moons
- (Titan – largest, half size of Earth)
- (Europa – possible life)
Least dense planet (would float in your bath tub.)

19. Uranus Rotates with axis pointed towards sun
Discovered in 1781, first since ancient times
24+ moons, 11 thin rings
Atmosphere contain mainly hydrogen and helium and some methane
Difficult to study because of distance

20. URANUS AND RINGS

21. Neptune
Was predicted before it was even found due to variations in Uranus orbit
Thought to be made up of hydrogen, helium and methane
Has white clouds of frozen methane
Has strongest winds 1000km/hr (great dark spot)

22. Neptune gets its blue color from methane gas

23. Pluto (Not a Planet?) Orbits every 250 years
Made of frozen methane, rock and ice
Possibly a moon of Neptune that was pulled away into its own orbit

24. Other Objects
Kuiper Belt – A group of icy bodies that orbit the sun beyond Neptune
Dwarf Planets
- Pluto
- Quaoar
- Sedna
- Zena

25. Moon Natural Satellite = Moons Artificial Satellite = Sputnik (1958)
Apollo program sent 6 spacecraft to the moon between 1969 and 1972
Formation 4 billion years ago
A Mars sized object collided with Earth sending debris in orbit around the Earth

26. Moon
Rotation 27.3 days
Revolution (around Earth) 27.3 days

30. Lunar Eclipse When the Moon is eclipsed by the Earth
The sun is 400 times farther away from the Earth than the moon is
The sun is 400 times larger than the moon
Therefore, they appear as the same size in the sky!

33. Solar Eclipse When the Sun is eclipsed by the moon
Next total eclipse in the U.S.A. 2017

39. Asteroids
Small “rocky” objects that revolve around the sun (name means “starlike bodies”) also minor planets or planetoids
Move in highly elliptic orbits between the inner and outer planets

40. Asteroid Belt

41. Meteors
Meteoroids-small rocky bodies moving throughout the solar system
Meteors-when a meteoroid enters the Earths atmosphere
Meteorites-when a meteoroid falls to the Earth’s surface

44. Meteor Showers
Leonids (November)
Perseids (August)

47. Comets
Small bodies of Ice, rock, and dust that orbit the sun and gives off gas and dust in the form of a tail as it passes close to the sun.

50. Sun Composition – Hydrogen and Helium
Sunspots – A dark area of the photosphere of the sun that is cooler than the surrounding areas
Solar Flares – An explosive release of energy that comes from the sun
Auroras – colored light produced by charged particles from the solar wind and from the magnetosphere.

56. MILKY WAY GALAXY WHICH OUR SOLAR SYSTEM IS LOCATED.
CONTAINS 100 BILLION STARS.
SPIRAL GALAXY
CLOSEST NEIGHBOR : MEGELLANIC CLOUDS (IRREGULAR GALAXIES) 150,000 LIGHT YEARS AWAY