In which component of the interstellar medium do new stars form? O molecular clouds O HII Intercloud medium OHI clouds OHI and molecular clouds O hot coronal gas
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Q: All stars start their lives with the same basic composition. What determines their differences? O…
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A: Required : What are planetary nebula associated with.
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A: Solution:- Correct options is When the two vector s are perpendicular
Q: Why massive stars are short lived?
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Q: What is hydrostatic equilibrium in stars.
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A: Given Number of stars in an open cluster (n) = 450 Diameter of the cluster Dclu = 21 pc…
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A: Given Why do two different gasses always have different spectral signatures, as following below.
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Q: Based on what you know about main-sequence stars, select all of the correct statements from the…
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Q: why are Cepheid variable stars good distance indicators? What about supernovae?
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Q: Why do old stars have less metal compared to new ones?
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A:
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- List the following 5 terms in order through a stars life cycle (starting with the sun), through the remainder of its lifetime: a. Black dwarf b. Planetary nebula c. Red giant d. Star (Sun) e. White dwarfWhich statement is most logical? a First stars are thought to have been more massive than Sun because the materials used to make clouds were more abundant at the beginning b First stars are thought to have been more massive than Sun because the temperatures of the clouds that made them were higher because they consisted entirely of hydrogen and helium c First stars are thought to have been more massive than Sun because star-forming clouds were much denser early in time d First stars are thought to have been more massive than Sun because the clouds that made them were much more massiveIf an open cluster contains 350 stars and is 48 pc in diameter, what is the average distance between the stars? On average what, share of the volume of the cluster surrounds each star?
- Match each statement with the appropriate item (if the first corresponds to B and the next 4 to C, enter BCCCC) 1) group of stars that was formed all at the same time, with the same composition 2) the top of the main sequence of a cluster; more massive stars in the cluster have already evolved 3) globular clusters stars that are burning helium in their core 4) young, spread out star cluster 5) old, dense star cluster A. main sequence turnoff B. open cluster C. star cluster D. horizontal branch stars E. globular clusterProtostar A. among the most massive and brightest stars Main Sequence B. a star after it has used all of its nuclear fuel Giant C. a gravitational field so strong that not even light can escape upergiant D. star in the longest stage of life (90% of stars) Neutron Star E. a super bright explosion of a star Black Hole F. created when a star loses its outer layers of gases White Dwarf G. extremely dense remnants of a dead star Black Dwarf H. young star in the early stages of formation jupernova 1. star that no longer gives off heat or light Planetary Nebula J. star that is larger and brighter than a main sequence star : A : E : FWhy are red dwarfs very dim.
- Why are emission nebulae red ?What are the main products of the fusion reactions that take place in low mass main sequence stars?Question 41 .Suppose you are looking at H-R diagrams of two similar star clusters. The most luminous main sequence stars in the Porcini cluster are much more luminous than the most luminous main sequence stars in the Morel cluster. What can you conclude? O the Porcini cluster is younger than the Morel cluster O the Porcini cluster is farther away than the Morel cluster O the Porcini cluster is lower in metallicity than the Morel cluster O the Porcini cluster is larger in diameter than the Morel cluster