Starry Night The Stars L PDF

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Astronomy Assignement...

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The Stars Student Exploration Sheet

Directions: Open the SkyGuide pane, and navigate to Student Exercises > G – Stars > G2: The Stars and follow the instructions given as you go through each page of the activity. Record your answers to the questions in the spaces provided. Leave the last column blank for now. Star Database Star

Color

Distance from Sun in light years

Sirius

White

Aldebaran

Apparent magnitude

Temperature in Kelvins

Luminosity

8.58

-1.44 and +8.5

9400

34.5 Suns

White Dwarf

Red

66.6

+0.99 and +13.60

4050

102 Suns

Orange Giant

Pollux

Orange

33.8

+1.22 and +13.70

4660

44.5 Suns

YellowOrange Giant

Capella

Gold & Blue

42.8

+0.07 and +17.10

4800

40.6 Suns

Red Giant

Procyon

YellowWhite

136

+5.59

7000

3.37 Suns

Main Sequence

Betelguese

Orange

500

+0.56 and +14.50

3500

14700 Suns

Red Supergiant

Question 1: Colorful stars a) Do all stars have approximately the same temperature? Explain. No, they are thousands of degrees apart. b) What seems to be the color of stars that have a temperature in the 3000’s degrees? Orange c) Pick any other orange star in the main window and enter its name and temperature in the table. Was your prediction in b) correct? Arcturus - 4250K. Close, but no d) Are all stars about the same size? Page 1 of 2 © Copyright Starry Night Education

The Stars Student Exploration Sheet

No e) Do stars always appear brighter when they’re closer to us? Explain. No, some stars are just dimmer than others f) Do bigger stars always appear brighter to us? Explain. Yes, the bigger the brighter they can burn Question 2: In the beginning Why are stars born in a nebula? Because nebula’s contain all the resources necessary for stars and their fuel Question 3: Going out gently Why is the central star of the nebula difficult to see? Because the center is an incredibly small, dense, core Question 4: Going out with a bang The Crab Nebula requires a telescope to see. Telescopes were not invented until the 1600’s. How could the supernova have been seen in 1054? Because supernova’s burn incredibly bright and can be seen from a lot further away Question 5: The H-R Diagram All the stars shown in the main window are plotted on the H-R diagram. Point to any star in the main window and a red dot will show its position on the H-R diagram. Go ahead, try it! a) Now let’s fill in the last column on your Star Database. Record to what group each star in your database belongs. (i.e. red giant, main sequence etc) b) To what group do you think the star Rigel belongs? (Hint: read the introduction carefully) Red Giant

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