(Solved): eventualty are toreed to break through the photosphere as cooter aumsets; C) Cometa crashing hato t ...

eventualty are toreed to break through the photosphere as cooter aumsets; C) Cometa crashing hato the sun eoot the photosphere. Comets hit the sun fin awarms) every 11-years: D) Alt stars have been observed to have periodic instabitity between the overiving Wreight of hydrogen and the outward presseure of fusion reactions. 59. We define one as the diatance to a star when its apparent arvpuiar sthith relative to the distant stare is , after the earth has moved in its ortsial posision by That distance is also equal to A) parsee, 1\%, one orbital diameter, 3.26 lipht years: B) parsec, one second of are, 1 astronomical unit + 3.26 LY; C) astronomical unit, one second or are, one orbital diameter, $32.6\mathrm{LY}$; D) parsec, 1 minute of are, 1-AU, 3.26 LY. 60. An astronomer determines the distance to a nearby atar by noting a paraliax angle stith of 0.01 seconds, after the earth has moved one astronomical unit in its orbit. What is the distance to that star in parsecs and light years...? A) .25 parsecs, $1.73\mathrm{LY}$. B) 100 parsecs, $326\mathrm{LY}$. D) 10 parsecs, $32.6\mathrm{LY}$. C) .25 parsecs, $13.04\mathrm{LY}$. 61. What is correct order for the seven classes of stars, from hottest to coolest...? Also, which star is cooler, an $\mathrm{Fg}$ star or A3 star...? A) OBAGKME, F9 B) OBAFGKM, F9 C) OBAFGKM , A3 D) MKGFABO, $\mathrm{AB}$ USE THE ACCOMPANYING HR DIAGRAM FOR QUESTIONS 62.63.64 \& 65. 62. The Hertzsprung-Russell (H-R) Diagram organizes stars by plotting their against their A) spectral type, mass; B) surface temp', spectral type ;