1. Our Solar System

2. The Sun Our Solar System’s Star Current Age- 5 Billions years old
Life Time Expectancy- 10 Billions years
99.8 % of our solar systems total mass.
108 Earth fit across the diameter

3. Mercury 1st Planet 58,000,000km Rotation 59 Earth days
Revolution 88 Earth Days
Solid, rocky, surface.
-173C to 427C
Very cratered
Very thin atmosphere- Sodium and other Elements.
No Moon
Factoids: Very hard to get a good view, has an extreme temperature range.

4. Venus 2nd Planet 108,000,000km Rotation Period- 243 Earth Days
Retrograde rotation- rotates east to west.
Revolution Period- 225 Earth Days
A solid, rocky, cratered surface with volcanoes.
460ºC hot enough to melt lead.
Greenhouse effect- traps heat in the atmosphere, due to Carbon Dioxide.
Very thick atmosphere, cloud covered.
No Moon

5. Earth 3rd Planet 150,000,000 km Rotation 24 Earth hours
Revolution Earth Days
Solid, rocky, surface, 71% liquid water
-88°C to 58°C
Atmosphere- nitrogen and oxygen
One natural satellite - Moon
Factoids: living beings and all that is needed to sustain life

6. Mars 4th Planet 228,000,000km Rotation 1.03 Earth Days
Revolution- 687 Earth Days
Solid, rocky, surface. (the red planet)
-87°C to -5°C
Once believed there were canals.
Has ice caps (made of frozen carbon dioxide and
water.)
Has seasons. (dust storms)
Very thin atmosphere- mostly carbon dioxide
2 Moons-Phobos and Deimos

7. Asteroid Belt Between Mars and Jupiter. Over 10,000
Too small and numerous to be planets.
Ceres is a dwarf planet
An asteroid might have made the dinosaurs extinct.

8. Jupiter 5th Planet 778,000,000km Rotation .41 Earth Days
Revolution 12 Earth Years
Gas giant, No Solid Surface
- gravity keeps gases in
x 1027 kg
300 times more massive than Earth
solid core of rock and ice
Very dense atmosphere- hydrogen and helium
Great Red Spot (giant hurricane – fit 3 Earths)
Moons: 62 (Io, Ganymede, Calisto, Europa)

9. Saturn 6th Planet 1,427,000,000km Rotation .43 Earth Days
Revolution 29 Earth Years
Gas giant, No Solid Surface
x 1026 kg
solid core of rock and ice
less dense than water
Very dense atmosphere- hydrogen and helium
1000’s of rings (made of rock and ice)
Moons: 60 (Titan)

10. Uranus 7th Planet 2,871,000,000km Rotation .72 Earth Days
Revolution 84 Earth Years
Gas giant, No Solid Surface
x 1025 kg
solid core of rock and ice
rotates on its side
Very dense atmosphere- traces of methane
Thin rings (made of rock and ice)
Moons: 27

11. Neptune 8th Planet 4,479,000,000km (30 Earth’s)
Rotation .67 Earth Days
Revolution 165 Earth Years
Gas giant (gravity keeps gases in)
x 1026 kg
solid core of rock and ice
found by a mathematician
Very dense atmosphere- traces of methane
The Great Dark Spot (Didn’t last long)
Thin rings (made of rock and ice)
Moons: 13 (Triton)

12. Which of the following statements correctly
describes the planets of our solar system?
A. Saturn is the farthest planet from the sun.
B. Mercury takes the shortest amount of
time to revolve around the sun.
C. Venus is the 5th planet from the sun.
D. Mars takes less time to revolve around the
sun than the Earth.

13. Which of the following statements
correctly describes the Planets of our
solar system?
The outer planets have rocky surfaces with cores of gas.
The rocky surface of Venus is covered with ice.
The inner 4 planets have rocky surfaces while the outer planets are gaseous.
Jupiter is the smallest of the Outer Planets.

14. Comet “Dirty snowballs” Spherical chunks of ice, rock and dust
Tens of thousands of Kilometers across
Very long and elliptical orbits
Sun melts the ice into gas and forms a tail.
Solar wind pushes tail away from the sun.
Halley’s comet- Every 76 Years (2062)

15. Parts of a Comet 2.Nucleus- Central part of a comet.
3.Tail- gas and dust, pushed away from the sun due to solar wind.
1.Coma- gas and dust from the inner layer.

16. Asteroids & Meteoroids
Asteroids and meteoroids are irregularly-shaped chunks of rock in space.
Asteroids are usually around a kilometer in size.
Meteoroids are smaller than asteroids.
Meteoroids usually form from a comet or asteroid.

17. Meteor
Meteors are small meteoroids enter the Earth’s atmosphere and burn up entirely.
Meteoroids burn due to the friction with the atmosphere.
Meteors appear as a streak of light.
Meteors are referred to as Shooting Stars.

18. Meteorites
Meteoroids that are too big to burn up completely as the pass through the atmosphere.
Meteorites survive entry and hit the Earth’s surface.

19. Celestial body # 1 is most likely which of the following? A. a star
CHARACTERISTICS OF SOME CELESTIAL BODIES
Celestial body # 1 is most likely which of the following?
A. a star
B. an asteroid
C. a comet
D. a planet
Celestial Body
Shape
Diameter
Composition 1
Spherical
12,000 Km
Rock, Dust, & Ice 2
Irregular
1 Km
Rock and Metal 3
1 Million Km
Glowing Gas