1. STARS & PLANETS

2. DEFINITIONS-
Solar System- Sun & all objects that are gravitationally bound
to the Sun.
Star- enormous hot ball of gas held together by gravity.
Planet- an object which revolves around a star.
Moon- an object which revolves around a planet.
Satellite- any object which revolves around another object.
Asteroid- rocky body too small to be a planet.
Comet- object in space made up of ice & dust.
Meteor- Chunks of burning rock & dust in our atmosphere.

3. M y
V ery
E legant
M other
J ust
S erved
U s
N achos
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune

4. INNER PLANETS: Terrestrial (rocky)-
OUTER PLANETS: Gas Planets:

5. Mercury- -- Rocky & cratered. - No moons. - No atmosphere.
- Surface temperature: C.

6. Venus- - Rocky. - No moons. - Closest to Earth. - Retrograde rotation.
- Atmosphere is mostly
carbon dioxide.
- Avg. surface temp.: 460 C

7. Earth- - Rocky. - One moon. - Only planet with life.
- Only planet with water.
- Avg. surface temp.: 10 C.
- Seasons due to tilt on axis.

8. Mars- -- Rocky. - Has 2 moons. - Atmosphere thin CO2.
- Polar ice caps.
- Volcanoes & canyons.
- Has seasons.
- Avg. surface temp.: -50 C.

10. Jupiter- -- Gas giant. - 63 moons + faint rings.
- Mass greater than all
other planets combined.
- No solid surface.
- Composed mainly of:
hydrogen & helium.
- Great Red Spot.

11. Saturn- -- Gas giant. - 47+ moons, rings of rock & ice.
- Like Jupiter has rapid rotation,
thus it has many storms.

12. Uranus- -- Gas giant. - 27 moons plus rings. - Atmosphere mostly
hydrogen & helium.
-- Retrograde rotation.

13. Neptune-
-- Gas giant.
- 13 moons plus rings.

16. DIFFERENCE BETWEEN PLANETS & STARS:
STARS- every star in the sky is a SUN; stars produce
their own light by nuclear fusion.
PLANETS- reflect light from the stars.

17. Sun-
Medium sized star
Center of our solar system
Part of the Milky Way Galaxy
One of many stars in our galaxy