What is the most common type of star?
Q: All stars start their lives with the same basic composition. What determines their differences? O…
A: Mass they formed with
Q: The magnitude of star A is 11 more than that of star B. How is their corresponding brightness…
A: Stars that can be seen by the naked eye, tend to be greater in diameter and shine more brightly than…
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: Rank the following stars in order of increasing radius: Star A Star B Star C Surface temperature…
A: For star A Surface temperature =6000 K Luminosity =1 For star B Surface temperature =4000 K…
Q: Each choice below lists a spectral type and luminosity class for a star. Which one is a hot main…
A: Luminosity of main sequence star is class V and spectral type of hot main sequence star is O.
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: Which of the following is least reasonable regarding a star's position on the HR diagram? Group of…
A: "White dwarfs are small and cool and are located in the lower left part of the HR diagram."This…
Q: If parallax of a star is 0.22 arc-seconds and its apparent brightness is 50 x 10-6 W/m2 . What is…
A: Given: Apparent Brightness,b=50×10-6W/m2Parallax of star,p=0.22arc-secondsDistance to the…
Q: What is the temperature of a star emitting light with a peak wavelength of 7,080 angstroms? T=…
A: Given : λmax = 7080 angstroms = 7080*10-10 m. From Wien's law the temperature of star is T =…
Q: Calculate the distance of a star if the stellar spectrum indicates an absolute magnitude of -10.0,…
A: The expression for the distance can be written as m-M=5logd10…
Q: Why does the luminosity of a star depend on both its radius and its temperature?
A: Luminosity is the radiant power emitted by star. The luminosity is measured in Watt or Joules per…
Q: If a star's absolute magnitude value is significantly larger than its apparent magnitude value…
A: Absolute magnitude Mv: The magnitude that a star is expected to have if it were at a distance of 10…
Q: A star has an apparent magnitude of 10.0 and an absolute magnitude of 2.5. How far away is it?
A:
Q: What is the difference in magnitude for two stars is one appears four times brighter than the other?
A: one star appears four times brighter than the other It means the intensity of the total…
Q: If a star has an apparent magnitude equal to its absolute magnitude, how far away is it in parsecs?
A: Given that :Apparent magnitudemp=Mv
Q: What causes a star to move off the main sequence?
A:
Q: Which of the following spectral classes has stars with the hottest temperature? a. F0 b.…
A: Here given the stars with spectral classes.We have to find the stars which is hottest.
Q: What is the luminosity of a star having three times the radius of the Sun and a surface temperature…
A: The luminosity of a star is a measure of the total amount of energy that is radiated by a star per…
Q: What is an eclipsing binary?
A: Eclipsing binary is a variable star. It comes under binary star system.
Q: Star 1 and star 2 have the same V-magnitude, V = 7.5. However, they have different B-magnitudes, B1…
A: Given data : Star 1 and star 2 V-magnitude, V = 7.5 B-magnitudes, B1 = 7.2 and B2 = 8.5 d2 = 10d1 To…
Q: Star A’s luminosity is four times greater than Star B’s. Both stars have the same surface…
A:
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: Why do distant stars look redder than their spectral types suggest?
A: The pace is mostly empty but there are areas of large density of the interstellar medium. It…
Q: You observe a star with an apparent magnitude mv=12 at a distance of 1 kiloparsec. What is this…
A: The relation between apparent magnitude, absolute magnitude, and distance of star in parsec is given…
Q: Stars A, B, C, D, and E have apparent magnitudes of 7, 3, -1, 15, and 0, respectively. 1) Which…
A: Here, Apparent Magnitude of Star A=7 B=3 C=-1 D=15 E=0
Q: Use the Luminosity Distance Formula. Find the distance to a star (L=2.2x1026 watts) whose apparent…
A:
Q: Why does the orbital period of a binary star depend on its mass?
A: A binary system is formed when two massive astronomical objects start orbiting each other around a…
Q: Given star A with apparent visual magnitude mv = 6.5, and star B with mv = 4.4, what is the flux…
A: Given, star A with apparent visual magnitude mA = 6.5, and star B with mB = 4.4, the flux ratio…
Q: What is the color of the stars shown on the diagram that have the lowest surface temperature? O red…
A: Required: Color of the stars,
Q: Which of the following is largest? the size of a typical star. 1 AU. the size of the earth. 1…
A: Required : Which of the following is largest. 1)The size of a typical star.2) 1 AU.3) The size of…
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- Star 1 and star 2 have the same V-magnitude, V = 7.5. However, they have different B-magnitudes, B1 = 7.2 and B2 = 8.5. What is the flux ratio, f1/f2, in the B-band?15 On a Hertzsprung-Russell diagram, where on the main sequence would we find stars that have the greatest mass? A B D Lower right Upper right Upper left Lower leftA turnoff point corresponding to the youngest star cluster would occur at what spectral classification? a. B b. A c. F d. G
- Which star is a white supergiant star that is brighter and hotter than the Sun?Calculate the distance of a star if the stellar spectrum indicates and absolute magnitude of -10 and the star has an apparent magnitude of 5.0 as seen from earthStar A is located four times farther from Earth than Star B, but both have the same apparent visual magnitude of 1 mag. Which star is intrinsically brighter and by how much?
- The spectral type of a star is directly related to its color. Recall that a star emits light as a blackbody, which has a particular shape to its spectrum, as shown in this figure. Based on this, what basic property of a star determines its color (and thus its spectral type)? Choose one: A. age B. composition C. radius D. temperatureNote: The answer should be typed. Asapwhat is the mass of a star with a main- sequence lifetime of 3 billion years