Use the data listed in Table 1 to plot the location of the globular clusters on Worksheet 1. Right Ascension (RA) goes in a counter-clockwise direction. That is, RA 0h is at the top, 6h is directly to the left, 12h is straight down, and 18h is directly to the right. Once you determine the direction you need using the RA provided, go the distance indicated (count outward from 0, at the center of the graph paper) and make a mark. Do this for each of the clusters listed. 1. Does your plot indicate a direction that you would believe to be toward the center of the Galaxy? What is the RA of that direction? 2. The center of the Milky Way actually lies in the direction of the constellation Sagittarius. Use the star charts in your textbook to find the RA of Sagittarius. What is the RA of Sagittarius? How does this compare with your answer to #1? 3. Estimate how far it is to the center of the Galaxy using your plot? What is that distance in kpc? 4. Use your textbook to find the actual distance to the center of the Galaxy in kpc. Convert this distance to kpc (if necessary) and compare it to your answer from the textbook. Show your calculations. 5. Summarize what you have learned from this exercise. Globular Clusters NGC 362 NGC 1851 NGC 2802 NGC 3201 NGC 4372 NGC 6352 NGC 6362 NGC 6440 NGC 6496 NGC 6528 NGC 6553 NGC 6624 NGC 6642 NGC 6712 NGC 6752 M4 M5 M10 M13 M14 M15 M19 M30 M55 M80 M92 M107 47 Tuc T Cen Table 1 RA 01.1h 05.25h 09.2h 10.3 12.4h 17.4" 17.5h 17.8 18.0 18.1 18.15h 18.4" 18.5 18.9 19.15h 16.4 15.3 16,9 16.7 17.6h 21.5" 17.0h 21.7h 19.7 16.3 17.4 16.5h 00.4 13.4 Distance (kpc) 9.0 10.8 9.2 5.0 4.9 5.4 7.1 3.7 9.0 7.3 5.9 8.5 6.2 7.6 4.2 2.1 7.6 4.4 7.2 10.2 9.4 10.6 8.2 5.2 8.3 7.8 5.9 4.6 5.2 WORKSHEET #1 LOCATION OF GLOBULAR CLUSTERS RELATIVE TO THE EARTH b 12 8 Y 18