What evidence is there that star formation has occurred recently?
Q: Star A and Star B are both on the main sequence. Star A is 74 times more luminous than Star B. What…
A:
Q: The two types of cycles proposed in the stars for fusion are ________ a) p-p cycle and p-e cycle…
A: Option b
Q: All stars start their lives with the same basic composition. What determines their differences? O…
A: Mass they formed with
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…
Q: Why are metals less abundant in older stars than in younger stars?
A: Answer: The metals which basically are non hydrogen and helium material are produced or created in…
Q: Q. 3: The angular velocity of rotation of a står (of mass M and radius R) at which the matter starts…
A: To find- Angular velocity=? Given- Mass of star=(M) Radius of star=R Matter starts escaping from the…
Q: Nuclear fusion occurs during most of a star's life O True False
A: Answer :- ---------- True Nuclear fusion occurs during most of a stars life. Because It is the…
Q: How do the temperature and size of a Sun-sized star fluctuate over the course of its life?…
A: Immediate Assistance : You cannot wait for help if you require quick aid. Because it also implies…
Q: Which elements are created in stellar nucleosynthesis? (Select all that apply) - oxygen - helium…
A: Among the elements listed, hydrogen and helium were created during big band and the rest of the…
Q: For each type of stellar explosion, identify its progenitor star
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Q: What is the life expectancy of a 2-solar-mass star?
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Q: Calculate the mass of a star having a diameter of 6E5 km and an average density of 1.5 g/cm3.…
A: We have : Density = masscolumeVolume of star = 43x π x r3Diameter of star = 6 x 105kmRadius of star…
Q: We observe a star that is dstar away. How much extinction would there need to be (i.e., what must…
A:
Q: How does the extreme temperature sensitivity of the CNO cycle affect the structure of stars?
A: As a result of the extreme temperature dependence of CNO burning, those stars that are dominated by…
Q: What critical event must occur in order for a protostar to become a star?
A: A very young star that is yet gathering mass from the parent molecular cloud is called a protostar.…
Q: Match the stars to their typical lifetimes on the main sequence. O Instructions 15 solar masses 1…
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Q: Describe the relationship between the concept of hydrostatic equilibrium and the interior structure…
A: On each and every star in the astrophysics, there are always two forces acting. The first force is…
Q: Why massive stars are short lived?
A: A massive star has a shorter life spanthan an average star because of fasterhydrogen fuel…
Q: When two stars are in the same star system, they can affect each other’s evolution. Two stars in the…
A: Two stars in the same system might evolve at a different pace, depending on their distances in the…
Q: What causes a star to move off the main sequence?
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Q: If the hottest star in the Carina Nebula has a surface temperature of 51,000 K, at what wavelength…
A: Concept: "The Wien's displacement law states that the wavelength carrying maximum energy is…
Q: Consider three main sequence stars: Star A is 12000 K, Star B is 6000 K, Star C is 3000 K. What are…
A: Given, Star A = 12000 K temprature Star B = 6000 K temprature Star C = 3000 K temprature So the…
Q: We observe a star that is dstar away. How much extinction would there need to be (i.e., what must 7…
A: A star is observed that is at a distance away.We need to find the value of the extinction required…
Q: What is the mass of a star with a main-sequence lifetime of 4 billion years? 17 X solar masses
A: According to stellar theories & observations the average lifetime of main-sequence stars has…
Q: What is hydrostatic equilibrium in stars.
A: The interstellar medium is mostly made of hydrogen. When the mass of the interstellar medium becomes…
Q: If an open cluster contains 450 stars and is 21 pc in diameter, what is the average distance between…
A: Given Number of stars in an open cluster (n) = 450 Diameter of the cluster Dclu = 21 pc…
Q: When a region of a molecular cloud collapses, a protostar is formed. How do the temperature and…
A: Protostars form primarily in the spiral arms of galaxies in the modern era, which spans at least the…
Q: If our Sun were surrounded by a cloud of gas, would this cloud be an emission nebula? Why or why…
A: Emission nebulae are formed in regions surrounding young stars. When a star is formed in the…
Q: If a star radiates energy at the rate of 5 x 1020 Js-1, what is the rate at which its mass is…
A: A
Q: Protostar
A: Protostar is
Q: suppose a planetary nebula is 2.8 pc in diameter, and doppler shifts in its spectrum show that the…
A: Given information: The diameter of the nebula (D) = 2.8 pc = 2.8 (3.1×1013 km) = 8.68 ×1013 km The…
Q: Star A and Star B are both on the main sequence. Star A is 63 times more luminous than Star B. What…
A:
Q: planetary nebula expands at 38 km/s. How far will it expand (in km) in 3 million years?
A: Here given nebula is expanding with given speed. As in 1 sec nebula expands 38 Km, In 3 million…
Q: A planetary nebula expands at 32 km/s. How far will it expand (in km) in 0.6 million years?
A: Expansion rate of the Nebula: It can be defined as the distance up to which the nebula expands in a…
Q: 2. A solar-type star is seen with an apparent magnitude my = 30. Assuming that there is no…
A: As we know that,The distance modulus is a common technique of measuring distances in astronomy. It…
Q: How massive have to be a main-sequence star in order to survive for at least 15 billion years?
A: The objective of this question is to determine the mass of a main-sequence star that would allow it…
Q: Why does a star's life expectancy depend on its mass?
A: Stars are formed due to the gravitational collapse of interstellar gas. This collapse is…
Q: In which component of the interstellar medium do new stars form? O molecular clouds O HII Intercloud…
A: Interstellar medium is the medium between matter and radiation. The matter are gases (gas cloud),…
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: Why do old stars have less metal compared to new ones?
A: As per the Big Bang theory, the universe expanded from an initial high-density state. In the…
Q: The main-sequence age of a star of 1M⊙ is about 1010 years. What is the main-sequence age of a star…
A: Answer the following question is
Q: The Orion Nebula is about 20 light-years (20 × 1018 cm) across, enclosing a roughly spherical area…
A:
Q: Calculate the mass of a star having a diameter of 6E5 km and an average density of 1.1 g/cm3
A: It is given that,
Q: Why is it that we can describe the life cycle of a star and be confident about it?
A: It is required to describe how we can get an idea about the life cycle of a star.
Q: We observe a star that is dstar away. How much extinction would there need to be (i.e., what must…
A:
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