The horizontal branch stars are giants fusing what element in their cores and then their shells? a. hydrogen b. helium c. carbon d. silicon
Q: 2. Explain the different mechanisms that power the internal heating of a giant star, a main sequence…
A: Question : Explain the different mechanisms that power the internal heating of a…
Q: Absolute visual magnitude is a. the apparent magnitude of a star observed from Earth. b. the…
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Q: Where does gold (the element) come from? A. It is produced during the supernova explosions of…
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Q: 1. The stellar parameter that best determines a star's location on the main sequence is: Select one:…
A: 1. The stellar parameter that best determines a star's location on the main sequence is: c. mass…
Q: 1. Using the observed (apparent magnitude) light curve for a Cepheid variable shown below, estimate…
A: Given is a plot between the apparent magnitude mV and the period in days plot So first from the…
Q: What is the surface temperature of a star that emits at a peak wavelength of 400 non? 1nm=1x10(-9) m
A: The peak wavelength λmax=400nm = 400×10-9m
Q: Two stars are in a closely orbiting binary system. The smaller star (a K-type main sequence star)…
A: The correct option. Following the mass transfer, which of the following is now true of the main…
Q: If a stellar remnant is in between 0.4 and 1.4 solar masses, the resulting object will be a a.…
A: If a stellar remnant is in between 0.4 and 1.4 solar masses, the resulting object will be a white…
Q: A star is observed with a surface temperature of 3,000 K and a luminosity of 100,000 solar…
A: Given , Temperature = 3000 K Solar Luminosity = 100,000 Now , mass and luminosity are related by…
Q: The most luminous main-sequence stars are spectral class a. A. b. O. c. G. d. M.
A: Answer: b. O. O type stars are most luminous.
Q: A group of graduate students, bored during a cloudy night at a the observatory, begin to make bets…
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Q: The period–luminosity relation is useful in determining a. the mass of a star for which the…
A: Period-luminosity relation :- According to this…
Q: Trappist 1 a small red dwarf (M*=0.089) with R*=0.12, L*=0.000553 and T=2566. What in AU's is the…
A: The Stefan-Boltzmann law states that the luminosity of the star:L=4πR2σT4………(1)where,R is the radius…
Q: What is the next stag cycle? - Supernova - Neutron Star
A: The sun is the source of heat and light and the midpoint and for the solar system. It is made up of…
Q: . How does the H-R digram of a given star cluster change as the cluster ages?
A: HR Diagram : Note : Blue color indicates the hottest stars and red color represent the…
Q: The gas and dust cocoon surrounding young stars a. is blown away when the young stellar surface…
A: In the initial stage of star formation i.e protostar phase the young star is surrounded by dust and…
Q: What kind of star is most likely to become a white-dwarf supernova? A. a star like our Sun B. a…
A: There are gas and dust particles in outer space when their mass increases they will start attracting…
Q: A 2-solar-mass star on the main sequence would have a luminosity of approximately ____________ solar…
A: Given A 2-solar-mass star on the main sequence would have a luminosity of approximately, as…
Q: Astronomers think of pulsars not as pulsing objects, but rather like a(n) a. Cepheid variable.…
A: A Cepheid variable is a class of stars, that varies in its apparent magnitude values over a period…
Q: Brown dwarfs are ____. a. stars with a very thick dust sphere around them, so they appear “brown”…
A: Required : Correct option.
Q: "Star Formation and Lifetimes" pg. 120, question 7 A star with twice the mass of the Sun would have…
A: In stars higher mass leads to higher compression. Which results higher Central density and…
Q: Originally, the signals that were found to be pulsars were thought to be a. spinning
A: We have to know about basic here.
Q: Consider two stars: one being a red giant with a spectral type K0 and one being a supergiant with a…
A: The intrinsic luminosity of a star is given by Stefan-Boltzmann's law as L=σAT4σ is the…
Q: Suppose you observe a tight eclipsing binary with orbital period of 3 days, and radial velocity…
A: 1. Suppose you observe a tight eclipsing binary with orbital period of 3 days, and radial velocity…
Q: Which of these is NOT used as a spiral tracer? a. O stars b. B stars c. young open clusters…
A: Spiral tracers are objects that are commonly found in spiral arms and soare used to trace spiral…
Q: . The spectrum of Star A peaks at 700 nm. The spectrum of Star B peaks at 470 nm. We know nothing…
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Q: A turnoff point corresponding to the oldest star cluster would occur at what spectral…
A: Turnoff point in HR diagram is the point where the star leaves the main sequence branch
Q: A helium flash occurs a. because helium is very explosive and cannot be controlled when the…
A: Required : Why does the helium flash occur.
Q: A star with an original mass of 9MSun undergoes an active period where it experiences mass loss via…
A: Given data: Mass of the star, Mstar=9Msun Time, t=1.1 million years = 1.1×106 years New mass,…
Q: Suppose a spectral line from an object in space was shifted from 5007.0 to 5100.0 Angstroms. What…
A: Given that: A spectral line from an object in space was shifted from 5007.0 to 5100.0 Angstroms.…
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: Star clusters are important to our study of stars because a. all stars formed in star clusters.…
A: A star cluster is a group of stars that share a common origin and are gravitationally bound for some…
Q: The approximate relationship between the luminosity and the period of Cepheid variables is Lstar[in…
A:
Q: Black holes are formed by A. collapsed dark nebulae. B. supernovae from binary stars. C. a lack of…
A: ASTRO PHYSICS
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.
Q: Based on what you know about main-sequence stars, select all of the correct statements from the…
A: Required : Correct statements .
Q: Absorption lines produced when starlight travels through the interstellar medium indicate that some…
A: The answer for the following question is
Q: How high or low a star is on the main sequence is dictated primarily by ... Select one: A. its…
A: Answer: A high or low a star is on the main sequence is dictated primarily is discussed below:
Q: Of the 2 stars: a low-mass star or high-mass star: a. Which star has more fuel? - b. Which star…
A: This is a question regarding the lifetime of a star. A star burns by the process of fusion. In…
Q: Place the following events in the formation of stars in the proper chronological sequence, with the…
A: The question can be solved as follows
Q: Stars are born in a. reflection nebulae. b. dense molecular clouds. c. HII regions. d.…
A: Option (B): Dense molecular cloud.
Q: A group of 10 to 100 stars that formed at the same time but are so widely scattered in space their…
A: Before answering, We will discuss each of the given options. 1) Globular cluster - Globular…
Q: The oldest globular clusters are a. 3 to 4 billion years old. b. 6 to 7 billion years old.…
A: The oldest globular clusters is NGC 121 around 9 to 10 billion years old.
Q: Which of the following types of data provide evidence that helps us understand the various stages of…
A: Low-mass stars use the proton-proton chain to fuse hydrogen to helium in their cores over billions…
| a. |
hydrogen
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| b. |
helium
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| c. |
carbon
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| d. |
silicon
|
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