1. Learning Goals:
4. Complex Knowledge: demonstrations of learning that go aboveand above and beyond what was explicitly taught. 3. Knowledge: meeting the learning goals and expectations. 2. Foundational knowledge: simpler procedures, isolated details, vocabulary. 1. Limited knowledge: know very little details but working toward a higher level.
How do stars differ from moons and planets, and from one another?
How does the classification of stars help us understand how they evolve over their lifetimes?
What are the different types of stars?
What happens when different types of stars die?
Why is it important for us to understand stars?

2. Bell Work
Stars A, B, C, D, and E have apparent magnitudes of 7, 3, -1, 15, and 0, respectively.
Which star appears brightest to us? _________
Which appears faintest? ________
Arrange the stars in order of declining brightness _______________.
Which stars could we see with our naked eyes?

3. Where do we get Info about stars
Absolute Brightness - math
Luminosity - math
Habitable Zone
Density
Age
Apparent Brightness (photometers)
Distance (parallax, variable stars, supernova 1a)
Surface Area/Volume/Circumference
Temperature – (color/wavelength)
Elements – (Spectrum Analysis)
Relative motion

4. Apparent vs. Absolute
Apparent Magnitude is the brightness of an object as perceived from earth.
Absolute Magnitude is the actual amount of energy being radiated from the star

5. Luminosity
σ - .29
T4 - Temperature
Surface area - 4𝜋 𝑟 2

6. Luminosity = Energy Brightness = Visible Light

8. Luminosity ENERGY output Stars put out energy as photons!
So…luminosity is basically brightness, but it is measured as energy

9. These are what the test questions will be like!!!!
So try to really answer them!
Don’t just copy a neighbor, but make sure you understand
Turn in Monday at Midnight!

10. Google Classroom
Due Today!