1. PROPERTIE S OF STARS There are many different types of stars in the Universe… our star… The SUN; is a very average staraverage star What Do we Know about Stars? Star Temperature and Color Star Mass from Binary Stars Star Brightness Temperatures A stars temperature is determined by its color Cool_____Medium____ _ Hot _____ Many stars orbit each other= BINARY STARS We can find the mass of these stars by the size their orbits, also the small star blocks light from the big star, that tells us their size as well. Binary Stars Apparent Magnitude Absolute Magnitude Wh at the star looks like from Earth… based on distance from earth The actual brightness of the star from 32.6 light years away…. Star Distance

2. Blue=hottest Red=coolest Yellow= medium GEOSCIENCE WARMUPS 4-26-12 Agenda: 1.WarmUp 2.COTD 3.Start on Star Poster 4.Star Movie Agenda: 1.WarmUp 2.COTD 3.Start on Star Poster 4.Star Movie Goal: I will be able to list the different colors of stars and their temps

3. What is the temperature of the sun a. Hot b. Cool c. Medium GEOSCIENCE WARMUPS 4-26-12 Agenda: 1.WarmUp 2.COTD 3.Complete 2 box on star poster 4.Star Movie Agenda: 1.WarmUp 2.COTD 3.Complete 2 box on star poster 4.Star Movie Goal: I will be able to describe how we tell the distance of a star from earth and its mass

4. Scientists use __________ to find the mass of stars a. Binary stars b. Parallax c. color GEOSCIENCE WARMUPS 5-2- 12 Agenda: 1.WarmUp 2.COTD 3.Complete 1 box on star poster 4.Star Movie Agenda: 1.WarmUp 2.COTD 3.Complete 1 box on star poster 4.Star Movie Goal: I will be able to describe how we tell the distance of a star from earth and its mass

5. Scientists use __________ to the distance of a star from Earth a. Binary stars b. Parallax c. color GEOSCIENCE WARMUPS 5-2-12 Agenda: 1.WarmUp 2.COTD 3.Complete 1 box on star poster 4.Star Movie Agenda: 1.WarmUp 2.COTD 3.Complete 1 box on star poster 4.Star Movie Goal: I will be able to describe how we tell the distance of a star from earth and its mass

6. This is the real brightness of a star from 32.6 light years away…. not from earth a. Real magnitude b. Apparent magnitude c. Absolute magnitude GEOSCIENCE WARMUPS 5-3-12 Agenda: 1.WarmUp 2.COTD 3.HR Diagram Poster 4.Star Movie 5.Quia Review Agenda: 1.WarmUp 2.COTD 3.HR Diagram Poster 4.Star Movie 5.Quia Review Goal: I will be able to describe how we tell the distance of a star from earth and its mass

7. HR DIAGRAM POSTER 1. Turn to page 704 2. Draw the diagram in figure 5, with color 3. Label the x and y axis 4. Draw and fill in the following table Star TypeAbsolute magnitude(Bri ghtness) Bright, Med, dim Temperature in degrees, then cool, medium, hot Color of star Super Giant White Giant Main Sequence White Dwarf Blue Giant

8. HR DIAGRAM POSTER 1. Turn to page 704 2. Draw the diagram in figure 5, with color 3. Label the x and y axis 4. Draw and fill in the following table Star TypeAbsolute magnitude(Bri ghtness) Bright, Med, dim Temperature in degrees, then cool, medium, hot Color of star Red super giantbrightCool, 3000red GiantMed brightCool, 3000red Main Sequence(Sun) medMed, 7000yellow White Dwarfdim7000white Blue GiantBright40000blue

9. HR DIAGRAM POSTER 1. Turn to page 704 2. Draw the diagram in figure 5, with color 3. Label the x and y axis 4. Draw and fill in the following table Star TypeAbsolute magnitude(Bri ghtness) Bright, Med, dim Temperature in degrees, then cool, medium, hot Color of star Super Giant White Giant Main Sequence White Dwarf Blue Giant

10. HR DIAGRAM POSTER 1. Turn to page 704 2. Draw the diagram in figure 5, with color 3. Label the x and y axis 4. Draw and fill in the following table Star TypeAbsolute magnitude(Bri ghtness) Bright, Med, dim Temperature in degrees, then cool, medium, hot Color of star Super Giant White Giant Main Sequence White Dwarf Blue Giant