Download Stars Lab

Name: ____________________________
Date: ___________________
Period: ____
Astronomy: Stars Lab
PART 1:
Use the Stars: Lights in the Sky (www.seasky.org/celestial-objects/stars.html) and answer following questions.
1. Name the brightest star in the known universe. _____________________________
2. What is this star’s apparent magnitude?
3. What is this star’s absolute magnitude?
4. Are the brightest stars low magnitude or high magnitude? ______________________________
5. Make a top 10 list of the names of the 10 brightest stars in the known universe and their magnitudes.
(http://space.about.com/od/stars/tp/brighteststars.htm)
Star
Absolute Magnitude
Apparent Magnitude
5.
In the space below, draw a colored diagram that displays the colors of the hottest and coolest stars.
Label the spectral classes (O, B, A, F, G, K, M) appropriately under each star color in your diagram as
well as the temperature.
PART 2: Use your chart and the Hertzprung-Russell diagram from the PowerPoint to answer the following
questions.
7.
What color is the brightest star?____________________________
8.
What color is the coolest star? ____________________________
9.
What color is our sun? ____________________________
10.
What spectral class of stars is the hottest? ____________________________
11.
What spectral class of stars is the coolest? ____________________________
12.
What spectral class is our sun? ____________________________