1. What is the name of our galaxy that our sun belongs to? ______________________
2. What is the name of the closest galaxy to our galaxy? _________________________
3. How far away is this galaxy to our galaxy? _________________________________
4. How many light years across is our galaxy? _________________________________
5. What is the name of the nearest star to our sun in light years? _____________
6. What is the color shift that occurs because of the Doppler Effect when a galaxy is moving away from our galaxy? _________
7. What is the color shift that occurs because of the Doppler Effect when a galaxy is moving toward our galaxy? ____________
8. Is the nearest galaxy to our galaxy moving toward us or away from us? ______________
9. How far way is the sun from the planet earth? _______________
10. What is the speed of light? ____________
11. How long does it take light to reach the earth from the sun? _____________
12. If the radius of the earth is 4000 miles, what is the circumference of the earth? ______________
13. Knowing the circumference of the earth and the fact that it takes 24 hours for one rotation of the earth, calculate the speed the earth is spinning at in miles per hour. _____________
14. Use this grid to find out what shape our galaxy is. Draw a star at each point. Connect the stars from one point to the next as you mark them. Use Graph Paper number the X axis 0-23 and the Y axis 0-23. Start with the first table of points and go on to the next one, connecting each point as you go along.
x y
23 5
20 2
12 0
5 1
3 4
1 9
2 16
4 19
10 22
17 21
22 15
22 10
17 4
8 5
4 7
4 14
9 19
16 19
19 11
15 6
9 6
6 10
8 15
13 17
17 14
15 9
10 9
9 12
10 14
14 14
15 11
12 10
11 11
12 13
13 11
12 12
15. What is the shape of our galaxy? _________________