What is the relationship between the color of a reflection nebula and the color of the star that illuminates it?
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…
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Q: What is an emission nebula?
A: The space between stars and galaxies is filled with clouds of gas and dust. These clouds of gas and…
Q: A star is known to be moving at 7.87km/s toward the earth. If you observe the spectral line to be at…
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Q: Why is the sun orange?
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Q: If one star has a temperature of 5,000 K and another star has a temperature of 8,500 , how much more…
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Q: Two stars of the same diameter or observed to have surface temperatures of 4000 Kelvin and 16,000…
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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: 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: 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: Earth tugs the sun around as it orbits, but it affects the radial velocity of the sun by only 0.09…
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Q: What is the apparent magnitude of the Sun as seen from Venus at perihelion? What is the apparent…
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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: From Earth, the Sun appears brighter than any other star because the Sun is the
A: From Earth , the Sun appears brighter than any other star because the Sun is the ______
Q: In the Sub giant phase which of the following is true? O The star is burning He in the core O The…
A: Given : In the Sub giant phase The star is burning He in the core The star is burning He in a shell…
Q: What causes a star to move off the main sequence?
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Q: Suppose the distance to a star is doubled. Then the luminosity of the star is O Remains the same,…
A: Luminosity and apparent brightness are 2 different things. Luminosity is unique property of body and…
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: 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: Star A has a temperature of 5,000 K. How much energy per second (in J/s/m2) does it radiate from a…
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Q: If a certain star is 4 times as hot as the sun and is 10000 times brighter than the sun, calculate…
A: Given, Temperature of star, TA=4xTE, Luminosity of star, LA=10000x LE.
Q: As we read in the book, a star that appears to be 1 magnitude brighter will have approximately 2.5…
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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: 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…
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Q: The white dwarf star Sirius B has a luminosity of 0.025 L⊙. If you were 1 AU from Sirius B, would…
A: Given,Temperature, Apparent magnitude of the sun, The luminosity of the star sirius B, The…
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- Which star is a white supergiant star that is brighter and hotter than the Sun?A 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?How is the blue color of a reflection nebula related to the blue color of the daytime sky?
- What is the luminosity of a star having four times the radius of the Sun and a surface temperature of 8,000 K?Suppose that two stars in a binary star system are separated by a distance of 80 million kilometers and are located at a distance of 160 light years from earth. What is the angular separation of the two stars? Give your answer in arcsecondsThe hottest star in the Orion Nebula has a surface temperature of 40,000 K. At what wavelength does it radiate the most energy?
- Why are emission nebulae red ?A fuel-efficient car is able to convert the chemical potential energy of gasoline into translational kinetic energy at an efficiency of 78.4%. If there is 8742 kJ of chemical potential energy in one tank of gas, what is the amount of translational kinetic energy produced. How to manipulate formula eff=output/input x 100Earth tugs the Sun around as it orbits, but it affects the radial velocity of the sun by only 0.09m/s. How large a shift in wavelength does this cause in the Sun's spectrum at 575 nm?