1. Copy page 118 Homework: Finish Gizmos Prepare for spiral Check MON/Tue
Objective:
students will be able to identify types of galaxies in the universe, identify the one we live in, and identify the 8 planets in the solar system.

3. #8 Stars and The Milky Way Galaxy

4. Units of the Universe
Light years- Distance it takes light to travel in one year
( 5.8 trillion miles)
Astronomical units- (AU)
Distance between the sun and the earth
(90 million miles)

5. Recap
What is farther away :
A planet 1 AU from earth or a planet 1 light year away from earth?
1 AU = 90 million miles
1 Ly = 5.8 trillion miles
1 Ly = 647 AU’s

8. Are we at the center of the Milky Way Galaxy?
Sorry, um, NO! Let’s draw a picture

11. Groups of Stars = A Galaxy
What is the name of our galaxy?
Milky Way Galaxy
What type of galaxy are we in?
A spiral galaxy

12. Stars

13. How do we measure stars? Hotness by color
Blue → Yellow →Red (least hot)
Brightness by Magnitude
1 = brightest (1st place winner=brightest!)
9 = less bright (9th place not as bright as 1st)

14. What kind of star is ours?
The sun is a main sequence star
Average temperature (Yellow star)
Average size (medium sized)
Neutron stars are size of a city
Dwarf star size of Earth
Super giant stars 100x sun

15. From birth to death..... All stars burn out (run out of H fuel)
A supergiant (100x sun) can explode before it dies. Then it is called a supernova.
A supernova will become one of two things. - a neutron star or a blackhole.
Our Sun will become a red giant about 3 billion years from now

17. Recap What is a collection of stars? Galaxies
2. What happens to the sun as it gets older?
Changes color
3. Happens to a sun when it dies?
Goes supernova (neutron star or black hole)

18. Planet Posters Requirements:
Use ipads and textbooks to answer the 14 questions at the tables
In groups research the planet you have been assigned.
Create a poster using the items provided for other students to take notes from

21. As a Review: What is a Solar System? - Solar means............ Sun!
So our solar system is made up of the sun, the 8 planets, and everything else that travels around the sun.
The sun is the only star in our SOLAR system, but one of billions in our galaxy