1. CELESTIAL BODIES-Part II
STARS
PLANETS AND DWARF PLANETS
OTHER CELESTIAL BODIES
SATELLITES
ASTEROIDS
COMETS
METEOROIDS

2. STARS LARGE BALLS OF GAS  AMOUNTS OF ENERGY (LIGHT AND HEAT)
LIFE CYCLE OF A STAR:
Born from a huge cloud of gas and dust (stellar nebula)  contracts by its own gravity to form a protostar
The core gets denser. Tª increases  becames a true star
Hydrogen atoms fuse together  helium
produces energy (light and heat)

3. Small/Medium sized star consumes all fuel (H)  becames a red giant.
Red giant die leave white dwarfs (NO energy)
Massive star fused all H  red supergiant  massive explosion (SUPERNOVA)

4. PLANETS AND DWARF PLANETS
Do not emit light
Visible by reflected light of a star
Spherical and with or without satellites
Planets do not share their orbit with other celestial bodies
Dwarf planets share their orbit
Movements:
Rotation
Revolution

5. Rotation:
Rotate on an imaginary axis
Time: it takes a planet to rotate 360º  how long one day last on the planet
Revolution:
Planets revolve around a star  curve line (orbit)
Time: it takes to revolve around the star  how long one year last on the planet

6. OTHER CELESTIAL BODIES
Satellites or moons
Celestial bodies that orbit planets or dwarf planets
Asteroids
rocky bodies, smaller than planets, orbit a star
Comets
Masses of ice, dust and rocks  move around a star in an elliptical orbit
Get closer to a star  ice changes into gas
Gas illuminated by the light of the star  tail

7. Meteoroids
Solid bodies came from asteorids, comets.
Meteoroid enters the Earth´s atmosphere  burns and disintegrates (meteor or shooting star)
The piece that hit the surface are called meteorites.