Why do distant stars look redder than their spectral types suggest?
Q: All stars start their lives with the same basic composition. What determines their differences? O…
A: Mass they formed with
Q: A star has a surface temperature of T = 10,000 K and a radius three times that of the Sun, R = 3R…
A:
Q: A star is known to be moving at 7.87km/s toward the earth. If you observe the spectral line to be at…
A:
Q: Why is the sun orange?
A:
Q: If one star has a temperature of 5,000 K and another star has a temperature of 8,500 , how much more…
A:
Q: Two stars of the same diameter or observed to have surface temperatures of 4000 Kelvin and 16,000…
A:
Q: What property of a star had a greater effect on the amount of light emitted—its temperature or its…
A: A very small increase in the temperature of star can significantly increase the energy emitted per…
Q: Hertzsprung-Russell Diagram Blue or blue w White Vellow Red orange Red Rioe Supergl Beteigeuse Main…
A: The region of main sequence contains large number of stars than any other region. Therefore most of…
Q: What are the approximate spectral type, temperature, absolute magnitude number, and luminosity of…
A: Required : Spectral type, absolute magnitude, temperature and luminosity of star E.
Q: What four (4) stars are not as bright (luminous) as our Sun? JUST NAME 4 STARS THAT ARE NOT AS…
A:
Q: At rest hydrogen has a spectral line at 149nm. If this line is observed at 144nm for the star…
A: Given:hydrogen spectral line at rest, λs = 149 nmobserved spectral line, λ = 144 nmAsked:What is the…
Q: Why is being able to determine a distance form just an angular measurement important? Also why is…
A: As we know, The angular measurements are the divided circle by the scale of a vernier protractor. It…
Q: Star A has a temperature of 3000K; Star B has a temperature of 5000K; Star C has a temperature of…
A: Given value--- temperature of star A = 3000 K. temperature of star B = 5000 K. Temperature of…
Q: What is the most common type of star?
A: There are different types of stars in our universe. They are mainly categorized based on their mass,…
Q: If star B is a 5th magnitude star and star C is 9th magnitude, what is their brightness ratio? Light…
A: Apparent magnitude of the star m is the measure of brightness of star from earth. Brightness is also…
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: Our Sun is considered an "average" star. What is the average star really like? Explain. Could you go…
A: We can define an average star as: An average star, or more properly, an intermediate-mass star,…
Q: Why does hydrogen, which is abundant in the sun's atmosphere, have relatively weak spectral lines,…
A: Atmos has electrons in different energy levels. Spectral lines are formed when electrons make…
Q: How does luminosity differ from apparent brightness ?
A: The difference between luminosity and apparent brightness depends on distance. Luminosity is an…
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: What is the Sun's energy output (luminosity)? Group of answer choices About 4 x 1026 Watts About a…
A: We know that, Sun has radius of 695 x 106 m giving a surface area of 6.09 x 1018 m2 .
Q: If star A is five light years away and star B is 10 light years away how much brighter is A than…
A: Given Data Distance of the star A is rA=5 light year Distance of the star B is rB=10 light year We…
Q: Why do two different gasses always have different spectral signatures?
A: Given Why do two different gasses always have different spectral signatures, as following below.
Q: In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm. If the line…
A: vr=cλ0-λλ0
Q: subject: astronomy) 1. When do you say a star is very hot compared to the red. 2. are stars of equal…
A: Answer (1) A blue star will always be hotter than the red star. It is independent of the relative…
Q: As we read in the book, a star that appears to be 1 magnitude brighter will have approximately 2.5…
A: Required : Approximate ratio of the flux.
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: Star 1 and star 2 have the same V-magnitude, V = 7.5. However, they have different B-magnitudes, B1…
A:
Q: The above spectrum is most plausibly produced by which kind of object? Select one alternative:
A: Required : Correct choice.
Q: You are trying to take an image of a particular star with apparent magnitude m=10, and need to…
A: Given: m=10 diameter=0.07 t=79 min
Q: Why do stars tend to form in groups?
A: Space is filled with an interstellar medium that consists of gas and dust particles. The density…
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- What is the relationship between the color of a reflection nebula and the color of the star that illuminates it?Barnard's Star is the 2nd closest star to Sol (~ 6 light years). It is moving toward the Earth with a speed of 110 km/s. Calculate the blue shift of light from Barnard's star, defined by AX/X. OA: OB: OC: OD: OE: -3.668x10-4 -4.586x10-4 -5.732x10-4 -7.165x10-4 OF: OG: -8.956x10-4 -1.120x10-3 -1.399x10-3 OH: -1.749x10-3A certain star has a temperature twice that of the Sun and a luminosity 64 times greater than the solar value. What is its radius, in solar units?
- The three most prominent spectral lines of hydrogen are H-α at 656 nm, H-β at 486 nm, and H-γ 434 nm. If we observe an object with H-α at a wavelength of 700 nm, what wavelength will we observe H-β and H-γ? Is the object moving toward or away from us, and how do you know? Suppose we observe another object with H-α at 585 nm. Is this object moving toward or away from us? Is it moving slower or faster than the first object?How is the blue color of a reflection nebula related to the blue color of the daytime sky?