AStrology: What is the role of gravitational force and gas pressure in star formation?
Q: Which type of fusion reaction supports stars for the longest time? Group of answer choices hydrogen…
A: The hydrogen to helium fusion reaction supports stars for the longest time. Because, the force of…
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A: Required : The correct choice.
Q: The figure below shows the spectra of two galaxies A and B. Please can i get help with this…
A: Dear student as per the QnA guidelines I will be answering the first 3 subparts of this problem…
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Q: The traditional theory of the formation of our galaxy CANNOT explain a. the existence of the disk…
A: a. The existence of the disk of the galaxy
Q: Cepheid-stars, which are examples of “Standard Candles", are useful to astronomers as indicators of…
A: Solution: Cepheid variable stars and Type Ia supernovae are the most valuable standard candles.…
Q: Neutron Star Accretion Disk. If the accretion disk around a 2.25-solar-mass neutron star has a…
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Q: The Hertzsprung-Russel Diagram (Figure 4) shows patterns of __, __, and __ of __ a. distance,…
A: Hertzsprung Russel diagram shows the different stages in the life of a star. It basically shows the…
Q: Where is Uranium produced? Group of answer choices In the early universe after the Big Bang. In the…
A: During supernova explosions, this is very powerful explosion creating atomic nuclei during the…
Q: The star Betelgeuse is about 197 pc away. How far is Betelgeuse in ly ? In meters? A. 642.2 ly= 2.08…
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Q: what is a star? define neclear fusion? how does nuclear fusion keep the star keep burning ?
A: Star : In basic we can say that star is a very large ball of bright glowing hot matter in space, and…
Q: I am trying to calculate the gravitational mass (in solar masses) I have the formula M= V^2 R / G…
A: Standard values:- Velocity of earth around the Sun (v) = 30 km/s = 30* 103 m/s The radial distance…
Q: Globular clusters contain no stars more massive than the Sun. Which of the following seems like the…
A: First, we are aware that no stars more massive than the Sun can be found in globular clusters. Any…
Q: Nuclear fusion is a process which releases large amounts of energy and takes place in the core of…
A: ANSWER: a) Nuclear fusion is the process in which lighter nuclei combine to form heavier nuclei. The…
Q: (Astronomy) Orbital Period. What is the orbital period of a bit of matter in an accretion disk…
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Q: Based on what you learned about the source of stellar energy and how stars make energy, select all…
A: Solution: 1. Many stars make energy with the proton-proton cycle. True, Many, less massive stars…
Q: White Dwarf Density. If a star the size of the Sun collapses to form a white dwarf the size of…
A: since the mass remains same , therefore the ratio of density is simply equal to reciprocal ratio of…
Q: . Imagine a giant sphere with a radius of 1 AU surrounding the Sun. What is the surface area of this…
A: "Since you have posted a question with multiple sub-parts, we will solve the first three subparts…
Q: Astrology: Why is carbon monoxide important for stars?
A: Solution:- A star whose atmosphere contains more carbon(C) than oxygen(O) is known as a carbon…
Q: Planets in the habitable zone of their stars: O are so far from their stars that it is very…
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Q: The figure below shows the spectra of two galaxies A and B.
A: 1. According to the figure Galaxy A has a high relative flux density which shows it has a dense…
Q: MODULE: From the Universe to the AtomTOPIC: Origins of the Elements (II)QUESTION:Part a) Explain why…
A: Part A:In a star cluster every star is expected to be formed from the same cloud of interstellar gas…
Q: Imagine that in the future, scientists plan on colonizing planets that orbit other stars. Based on…
A: SOlution:
Q: The first stars to form in our galaxy a. had circular orbits. b. had highly elliptical…
A: Population 1 stars are the newer and younger stars.
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A: A red giant star star may be a dying star within the last stages of stellar evolution. in just a…
Q: a)What is a neutron star? B)How are they formed? C)Will our Sun become a neutron star? Why or why…
A: a) A neutron star is a core which is formed from the collapsed super giant stars which had a total…
Q: Doppler-shift technology can be used to determine a star's technology has provided evidence that the…
A: Doppler shift is used to determine whether a star is moving towards us or moving away from us.
Q: Based on what you know about main-sequence stars, select all of the correct statements from the…
A: Required : Correct statements .
Q: Hotter, more massive stars are virtually absent from globular clusters. What does this tell us?…
A: Globular clusters are clusters of stars, that are nearly symmetrical and round shaped clusters.…
Q: Based on what you know about the interactions between stars and other interstellar media, select all…
A: Interstellar space and formation of stars Interstellar space is the space between stars. This space…
Q: Use excel calculator to fill in the missing calculations. 1pc = 3.26 ly Galaxy Andromeda Large Mag.…
A: We need to complete the table in Excel. 1pc = 3.26 lyAlso, 1 ly=9.461e+12 km
Q: What is fusion? How does it happen inside a star?
A: Nuclear fusion is the process by which two light atomic nuclei combine to form a single heavier one…
Q: Based on what you learned about stellar evolution, select all of the correct statements from the…
A: 1. Correct: From the studies, it has been found that the period of some Cepheid variables actually…
Q: Some interstellar Properties. Use excel calculator to fill in the missing figures. 1 ly = 365 × 24 ×…
A: A Table of a list of stars is given with their masses (given in solar masses) and distance to the…
Q: A radio broadcast was made in 1913. Since that time until 2011, how far has that radio broadcast…
A: The radio waves in a radio broadcast travel at the speed of light, that is 300,000 km/sec. So if the…
Q: the following statements so that they make sense according to star birth stages 1.At this stage,…
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Q: AStrology: What are the three most common celestial objects a star can become after it can't do…
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Q: List the following 5 terms in order through a stars life cycle (starting with the sun), through the…
A: When a star like the Sun forms, it is hot and glows. This phase is called the red giant phase. After…
Q: The microlensing technique for detecting extrasolar planets involves obtaining OBSERVING…
A: Given: microlensing technique for detecting extrasolar planets
AStrology: What is the role of gravitational force and gas pressure in star formation?
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- 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!The Tully-Fischer method relies on being able to relate the mass of a galaxy to its rotation velocity. Stars in the outer-most regions of the Milky Way galaxy, located at a distance of 50 kpc from the galactic centre, are observed to orbit at a speed vrot determine the mass in the Milky Way that lies interior to 50 kpc. Express your answer in units of the Solar mass. 250 km s-1. Using Kepler's 3rd Law,Another explanation for the Universe is the Steady State Hypothesis. The Steady State Hypothesis says that the Universe has always existed and is infinite in extent. Which of the following supports the Big Bang Theory and which supports the Steady State Model. (Select B-Big Bang Theory, S-Steady State Model, If the first is B and the rest S, enter BSSSSS). A) An observation that some globular clusters show M-type stars that have evolved off the main sequence. B) The measurement of redshifts that show galaxies appear to be moving away from each other and the Universe is expanding. C) A measurement that shows the density of the Universe is close to the critical density. D) The measurement of the microwave background radiation. E) Observing that galaxies at very large distances look identical to those in the nearby universe.
- What is the only viable explanation for so much mass in so small a region at the core of our galaxy? a. a tight cluster of stars b. many neutron stars c. many stellar black holes d. a single massive black hole e. none of the aboveMatch 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 clusterDescribe each of the following in detail, indicating their respective origins and the differences between them: Nova, Supernova type 1, Supernova type II.
- (Astronomy) Neutron Star Escape Velocity. What is the escape velocity at the surface of a 2.80-solar-mass neutron star that has a typical radius for this type of star? Express your answer in units of km/s.T/ F The distance unit best for interstellar distances is the light-year. ___ The distance unit best for intergalactic distances is the mega-parsec. ___A galaxy's rotation curve is a measure of the orbital speed of stars as a function of distance from the galaxy's centre. The fact that rotation curves are primarily flat at large galactocen- tric distances (vrot(r) ~ constant) is the most common example of why astronomer's believe dark matter exists. Let's work out why! Assuming that each star in a given galaxy has a circular orbit, we know that the accelera- tion due to gravity felt by each star is due to the mass enclosed within its orbital radius r and equal to v?/r. Here, ve is the circular orbit velocity of the star. (a) Show that the expected relationship between ve and r due to the stellar halo (p(r) xr-3.5) does not produce a flat rotation curve. (b) Show that a p(r) ∞ r¯² density profile successfully produces a flat ro- tation curve and must therefore be the general profile that dark matter follows in our galaxy.