Stars 2-1; part 2
How Bright is that Star?
1. What can you say about the brightness of the street lights as they appear in this picture?
Apparent Magnitude
2. Apparent magnitude is the ______________ of a star as it appears from ____________________.
Absolute Magnitude
3. Absolute magnitude uses a stars __________________ _________________ and its distance from Earth to
calculate its true _______________________. It’s actual brightness compared to other stars if they were all at
the ________ _________________ from Earth.
Absolute Magnitude
4. Absolute magnitude is calculated by comparing what a stars________________ would be at ______ parsecs
from Earth (~32.6 LY)
5. Our Sun would have a magnitude of __________. Compare this to it’s apparent magnitude of _______ because
it is so close to the Earth.
6. Absolute Magnitude vs. Apparent Magnitude :
How did video clip help your understanding ?
Distance to the Stars
7. Stars closer to Earth seem to _________, while more distant stars seem to stay in one place as the Earth
_________________ around the Sun.
8. A stars apparent shift in position is called __________________.
9. Using parallax, astronomers can find distances to stars that are close to Earth. Explain how this workd:
10. What did you learn from this simple Quick Lab ?
Motion of stars
11. Apparent motion of stars : Why do stars appear to move around Polaris?
12. Sun, Earth movements : Summarize what you learned from this video clip :
HW pg 39 1, 7, 10 in complete sentences