<p> Astronomy Assignment: Bright versus Nearby Stars</p><p>Your Name______</p><p>Your Class Meeting Time ______</p><p>This assignment is due on ___Monday, Nov 05______</p><p>Submit this cover sheet with your assignment.</p><p>Complete the assigned problems from the text listed below and address the Instructor Assigned Topic. Mathematical problems may be hand written. Write out the problem, show your work in solving the problem and state your answer in a complete sentence. Failure to complete all three of these tasks will result in less than full credit awarded. The Instructor assigned topic must be typed.</p><p>Text Problems: None</p><p>Instructor Assigned Topic: </p><p>Compare and contrast two sets of stars in two paragraphs. Data for those sets appears on the following pages. Also a blank HR diagram follows so you can plot the stars from both sets on it to aid in your comparison.</p><p>First paragraph: Summarize the properties of the twenty brightest stars and compare the twenty brightest stars to the Sun. Is the Sun like or unlike the brightest stars in the sky? Be quantitative in your description. </p><p>Second paragraph: Summarize the properties of the twenty nearest star systems and compare them to the Sun. Is the Sun like or unlike the nearest stars in the sky? Be quantitative in your description. </p><p>Third Paragraph: Does the Sun appear to be a common star. Comment on your feelings or the implications regarding your discovery.</p><p>Include the completed HR diagram for both sets of stars with your paragraphs. Use easily distinguished between symbols for the Bright Stars and the Nearest Stars. The Twenty Brightest Stars Multiple Spectral Luminosity Apparent Absolute Star Star Distance, lyrs Type Class Magnitude, m Magnitude, M System</p><p>Sirius Yes A1 V -1.46 1.4 8.8 Canopus F0 Ib/II -0.72 -3.1 98 Alpha Centauri Yes G2 V -0.01 4.4 4.3 Arcturus K2 III -0.06 -0.3 35.9 Vega A0 V 0.04 0.5 26.1 Capella Yes G0 III 0.05 -0.7 46 Rigel Yes B8 Ia 0.14 -6.8 815 Procyon Yes F5 IV 0.37 2.6 11.4 Betelgeuse M2 Ia/Ib 0.41 -5.5 490 Achernar B5 V 0.51 -1 65.2 Beta Centauri Yes B1 III 0.63 -4.1 295 Altair A7 IV 0.77 2.2 16.6 Alpha Crucis Yes B1 IV 1.39 -4 390 Aldebaran Yes K5 III 0.86 -0.2 52.2 Spica B1 V 0.91 -3.6 260 Antares Yes M1 IB 0.92 -4.5 390 Pollux K0 III 1.16 0.8 39.1 Fomalhaut Yes A3 V 1.19 2 22.8 Deneb A2 Ia 1.26 -6.9 2,600</p><p>Beta Crucis B0 IV 1.28 -4.6 490</p><p>2 The Twenty Nearest Star Systems Multiple Luminosity Apparent Absolute Distance, Common Name Catalog Name Star Spectral Type Class Magnitude, m Magnitude, M lyrs System</p><p>Alpha Centauri A Gl 559 A G2 V 0.01 4.38 4.36 Alpha Centauri B Gl 559 B Yes K0 V 1.34 5.71 4.40</p><p>Proxima Centauri Gl 551 M5.5 V 11.09 15.53 4.22 Barnard's Star Gl 699 M4.0 V 9.53 13.22 5.96 Wolf 359 Gl 406 M6.0 V 13.44 16.55 7.78 Lalande 21185 Gl 411 M2.0 V 7.47 10.44 8.29 Sirius Gl 244 A A1 V -1.43 1.47 8.58 Yes Sirius B Gl 244 B White Dwarf V 8.44 11.34 8.58 Gl 65 A M5.5 V 12.54 15.4 8.72 Yes UV Ceti Gl 65 B M6.0 V 12.99 15.85 8.72 Ross 154 Gl 729 M3.5 V 10.43 13.07 9.68 Ross 248 Gl 905 M5.5 V 12.29 14.79 10.32 epsilon Eridani Gl 144 K2 V 3.73 6.19 10.52 Lacaille 9352 Gl 887 M1.5 V 7.34 9.75 10.74 Ross 128 Gl 447 M4.0 V 11.13 13.51 10.91 EZ Aquarii Gl 866 A M5.0 V 13.33 15.64 11.26 Gl 866 B Yes ------13.27 15.58 11.26</p><p>Gl 866 C ------14.03 16.34 11.26 Procyon Gl 280 A F5 I IV 0.38 2.66 11.40 Yes Gl 280 B White Dwarf 10.7 12.98 11.40 61 Cygni Gl 820 A K5.0 V 5.21 7.49 11.40 Yes Gl 820 B K7.0 V 6.03 8.31 11.40 Gl 725 A M3.0 V 8.9 11.16 11.52 Yes Gl 725 B M3.5 V 9.69 11.95 11.52 Gl 15 A M1.5 V 8.08 10.32 11.62 Yes Gl 15 B M3.5 V 11.06 13.3 11.62 epsilon Indi Gl 845 K5 Ve 4.69 6.89 11.82 DX Cancri GJ 1111 M6.5 V 14.78 16.98 11.82 tau Ceti Gl 71 G8 Vp 3.49 5.68 11.88</p><p>RECONS 1 GJ 1061 M5.5 V 13.03 15.21 11.92</p><p>3 HR Diagram</p><p>Main Sequence Stars -10</p><p>-5</p><p>0 e d u t i 5 n g a M e t u l 10 o s b A</p><p>15</p><p>20 O0 O5 B0 B5 A0 A5 F0 F5 G0 G5 K0 K5 M0 M5 Spectral Type</p><p>4</p>