The oldest open clusters are a. 3 to 4 billion years old. b. 6 to 7 billion years old. c. 9 to 10 billion years old. d. 12 to 13 billion years old. e. 16 to 17 billion years old.
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The oldest open clusters are
a. 3 to 4 billion years old.b. 6 to 7 billion years old.c. 9 to 10 billion years old.d. 12 to 13 billion years old.e. 16 to 17 billion years old.
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Solved in 3 steps
- Radio maps of our galaxy show spiral arms because a. the arms have larger Doppler shifts. b. the gas in the spiral arms is very hot. c. the dust in spiral arms is denser. d. the gas in spiral arms is denser. e. the stars in the spiral arms emit most of their energy at radio wavelengths.The type of universe in which the average density is predicted to be greatest is the a. open universe. b. flat universe. c. closed universe. d. negatively curved universe.Ans:A.)1025N,B.)6088N Please show your complete solution and write clearly. Thank you.
- Why are we unlikely to find Earth-like planets around halo stars in the Galaxy? A. Halo stars formed in a different way from disk stars. B. Planets around stars are known to be extremely rare. C. Halo stars formed in an environment where there were few heavy elements to create rocky planets. D. Halo stars do not have enough mass to hold onto planets. Is the answer C? Since halo stars are formed early when the galaxy consisted of mainly hydrogen and helium, there are no heavier elements available to create Earth-like planets so just halo stars are formed? Thanks!What evidence is there that star formation has occurred recently?using wiens law 600nm
- 1 full explan please.. don't copyThe density of the universe is a. equal to the critical density if the universe is closed. b. equal to the critical density if the universe is flat. c. greater than the critical density if the universe is flat. d. greater than the critical density if the universe is open. e. none of the above.Measured ages of globular clusters and a study of the time required for massive stars to build up the present abundance of heavy elements suggests that the universe is a. at least 20 billion years old. b. no more than 10 billion years old. c. about 14 billion years old. d. flat. e. closed.
- Stars have the greatest metal content in which region of the Milky Way Galaxy? a. in the galactic halo b. in the nuclear bulge c. in the disk d. in the core e. in the spherical componentExplain pre main sequence evolution, early post main sequence evolution and advanced evolutionary stages.where did the 50 x 10^-3 come from and how did you get the math of -7.5