1. Warm - Up 1. List the outer planets. List the inner planets.
2. What is the difference between a meteor, meteorite, and meteoroid?
3. What is a comet?
4. What is a “shooting star”?

2. Stars and Galaxies
14 - 3

3. Satellites Satellites – anything that orbits another body
Natural satellites – Moon
Man made satellites – TV satellites

5. Stars
Always out
Can see better at night
Sun – closest star

7. Constellations
Constellations – groups of stars that form patterns in the sky
Named after animals, objects or people
Early Greeks discovered many

10. Starry Colors
Stars come in different
colors
sizes
temperatures
masses

11. Temperature Color indicates temperature Red – coolest Yellow – medium
Blue / white - hottest

12. Our Star
Sun – yellow, medium sized
½ way through it’s life

14. A Life of a Star Start as clouds of gas and dust Gravity collects
Gets so dense produces energy

15. Life of a Star Medium Star – used up some gasses in center
Expands – Super Giant
Eventually gas used up – contracts and becomes a Black Dwarf

16. Super Giants Uses up gases in core Eventually collapses
Supernova - Outer part explodes
Debris forms other stars

17. Neutron Star Core of the Super Giant
If large enough can become a Black Hole
Very dense area

18. Galaxies
Galaxies – a group of stars, gas, and dust held together by gravity

21. Light Years Light year – used to measure distance between galaxies
Light year – distance light travels in one year
9.5 trillion km
Looking back into time!

22. Milky Way Galaxy Galaxy we live in Over a trillion stars
Sun revolves around the Milky Way
Once every 240 million years

24. The Universe Over 100 billion galaxies, or more?
All make up the Universe
What are the chances that we are alone?

25. Vast Reaches of Space Clip