A planet orbits 1 AU from a star that is 1.5 times as massive as our Sun. How does the star's luminosity compare? LSun If the star has the same radius as our Sun, what is the temperature of the star compared to the Sun? T TSun If Earth's average temperature is 287 K and the Sun were replaced with this star, how would its average temperature change? (Enter a temperature in K. Assume that Earth temperature is proportional to solar flux.) K

Q: Star A and Star B are both on the main sequence. Star A is 74 times more luminous than Star B. What…

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Q: How many times brighter or fainter would a star appear if it were moved to: a. twice its present…

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Q: A star has a surface temperature of T = 10,000 K and a radius three times that of the Sun, R = 3R…

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Q: A 46M Sun main sequence star loses 1 MSun of mass over 105 years. (Due to the nature of this…

A: Total mass is The main sequence star loses  of mass over Find:(a) The solar mass lost in a year.(b)…

Q: Choose the correct statements concerning spectral classes of stars. (Give ALL correct answers, i.e.,…

A: A) The K star or orange dwarf has spectrum dominated by hydrogen ionization lines not of ionized…

Q: A star's Zero Age Main Sequence (ZAMS) radius R, luminosity L, and effective temperature Teff depend…

A: Given: Zero Age Main Sequence is beginning point of the main sequence of the star. The radius at…

Q: 3. By how many magnitudes is a K5 I star more luminous than a K5 V star? How many times m luminous…

A: The magnitude of K5 I star luminosity is 0.46 luminous. The magnitude of K5 V star luminosity is…

Q: 3) indicate which locations in the H-R diagram correspond to places where the evolution is slow.…

A: Using the H-R diagram shown the places where the evoultion has been slow is identified.

Q: require(s) that a young hot star (T ≥ 25,000 K) be relatively nearby.

A: Correct answer is Emission nebula

Q: A group of graduate students, bored during a cloudy night at a the observatory, begin to make bets…

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Q: For a main sequence star with luminosity L, how many kilograms of hydrogen is being converted into…

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Q: Wher would a star be located in the main sequence relative to the sun if its mass is 10 times that…

A: The position of the sun is in the middle of the H-R diagram due to its moderate temperature,…

Q: Suppose a protostar has a luminosity of 157,341 Lo and a surface temperature of 4,540 K (Kelvins).…

A: Given: Luminoscity of protostar,  157341 LS Surface temperature of protostar, 4540 K Surface…

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: Which of the following is least reasonable regarding the mass of stars? Group of answer choices…

A: Stars are of different sizes and they have their own set of characteristics based on multiple…

Q: Consider two stars, A and B, of equal size. You take a spectrum of each star and find that the flux…

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Q: (Astronomy) X-Ray Binary. If an X-ray binary consists of a 20-solar-mass star and a…

A: Solution:   Given Values,   Mass of the star A MA=20 solar mass Mass of the neutron star  MS=2.25…

Q: True or False 8. Almost all stars are in binary systems. The book says: "So far you have been…

A: The statement: All stars are in binary systems. The book says: "So far you have been considering the…

Q: This star has a mass of 3.3 MSun.  what is the main sequence lifetime of this star? You may assume…

A: Given data: Mass of the star MStar=3.3 MSun. The life time of the main sequence star is given as,…

Q: Consider two stars on the main sequence, A and B. Star A has a mass of Мо Star B has a mass of 0.2…

A: Solution attached in the photo

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 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: Two stars have the same apparent magnitude, my = 14, but Star A has a parallax of 0.060 arc seconds…

A: Required to compare two stars A and B

Q: A planet orbits 1 AU from a star that is 2 times as massive as our Sun. How does the star's…

A: Let, The luminosity of the star = L The luminosity of the Sun = LSun The mass of the star  = M The…

Q: 2GM What is the escape velocity (in km/s) from the surface of a 1.1 Mo neutron star? From a 3.0 M.…

A: Escape velocity is the speed  that is sufficient for a body to escape from a gravitational center of…

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: Draw an H-R diagram and dot the following question options on the diagram (using the letters given…

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Q: White Dwarf Size II. The white dwarf, Sirius B, contains 0.98 solar mass, and its density is about 2…

A: It is given that, M=0.98 solar mass=0.98×1.989×1030 kg=1.95×1030 kgρ=2×106 g/cm3=2×106×103…

Q: Part 1 or 2 To determine the lifetime of a 1.51Meun star, we use the formula for stellar lifetimes.…

A: We used the given formula,

Q: Star A and Star B are a bound binary at a distance of 20 pc from the Earth. Their separation is 30…

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Q: You discover a binary star system in which one member is a 15 solar-mass main-sequence star and the…

A: Required : The correct option.

Q: Stellar Classification and H-R Diagram Placement (40 points available). a. Where is your star…

A: ..

Q: A 1.4 M. neutron star and a 0.5 M. white dwarf have been found orbiting each other with a period of…

A: The given formula works only if we put quantities in the units given, solar mass, years and…

Q: The mass-luminosity relation describes the mathematical relationship between luminosity and mass for…

A: Given,mass =4M⊙ Note: We’ll answer the first question since the exact one wasn’t specified. Please…

Q: If a T Tauri star is the same temperature as the Sun but is eighteen times more luminous, what is…

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Q: If a star has a surface temperature of 3000 K but a luminosity 150 times greater than our Sun, what…

A: luminosity =  150 times greater than Sun, temperature = 3000 K what size is this star?

Q: Choose the statements that correctly describe the characteristics of the stars located in the…

A: Option-E is the correct option.

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: 14 Suppose you see two main-sequence stars of the same spectral type. Star 1 is dimmer in apparent…

A: We know apparent magnitude(m) is related Radiant flux (F): F2F1=100(m1-m2)/5And…

Q: Using the center-of-mass equations or the Center of Mass Calculator (under Binary-Star Basics,…

A: Given: In this question, the given details are Consider the star 1 has m1=3.4 solar masses, and the…

Q: A star has a period of P = 37 days. It has a radius of 5.7 times the radius of the sun. Calculate…

A: The period of the star: P = 37 days (37 x 24 x 60 x 60 seconds = 3.2 x 106 seconds); The radius of…

Q: Indicate whether the following statements are true or false (Select T-True, F-False. If the first is…

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Q: Finally estimate the lifetime of an M0 spectral type star if the total mass of the star is M =…

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Q: A star"s position in the sky against distant background objects has shifted by 0.4" in 6 months it…

A: Given: shift, 0.4'' in 6 months  To Find: (a) stellar parallax p of star (b) distance of star from…

Q: Suppose a star has a luminosity of 7.0x1026 watts and an apparent brightness of 4.0x10-12 watt/m?.…

A: Given: The luminosity is 7x1026 W. The apparent brightness is 4x10-12 W/m2.

Q: using the center of mass equations or the Center of Mass Calculator (under Binary Star Basics,…

A: Given: In this question, the given details are, To investigate a specific binary-star system by…

Q: A. Estimate the surface gravity of a neutron star with R = 10 km and M = 2Mo. B. Determine the…

A: The surface gravity, also termed as the acceleration due to gravity, on the surface of any planet is…