Loose Leaf For Explorations: Introduction To Astronomy
9th Edition
ISBN: 9781260432145
Author: Thomas T Arny, Stephen E Schneider Professor
Publisher: McGraw-Hill Education
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Question
Chapter 14, Problem 1TQ
To determine
The relative number of blue, white, yellow and red stars visible in the night sky and whether any kind of yellow stars be visible to the naked eye.
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At what wavelengths do stars of surface temperates 20 000 K, 10 000 K, and 3000 K have their peak intensity?
A star has a luminosity (power output) of 9.2x1026 W and a diameter of 6.1x108 m. What is its surface temperature? (Give your answer in SI units and include the units in your answer.)
A star has a surface temperature of T = 10,000 K and a radius three times that of the Sun, R = 3R (recall that symbolizes the Sun). What is its luminosity, L, in units of solar luminosities, L ? Give your answer to three significant figures.
answer, expressed in solar luminosities, tells how many times more luminous this star is than the Sun.
Chapter 14 Solutions
Loose Leaf For Explorations: Introduction To Astronomy
Ch. 14 - Prob. 1QFRCh. 14 - Prob. 2QFRCh. 14 - Prob. 3QFRCh. 14 - Prob. 4QFRCh. 14 - Prob. 5QFRCh. 14 - Prob. 6QFRCh. 14 - Prob. 7QFRCh. 14 - Prob. 8QFRCh. 14 - Prob. 9QFRCh. 14 - Prob. 10QFR
Ch. 14 - Prob. 11QFRCh. 14 - Prob. 12QFRCh. 14 - Prob. 13QFRCh. 14 - Prob. 14QFRCh. 14 - Prob. 15QFRCh. 14 - Prob. 16QFRCh. 14 - Prob. 17QFRCh. 14 - Prob. 18QFRCh. 14 - Prob. 19QFRCh. 14 - Prob. 20QFRCh. 14 - Prob. 21QFRCh. 14 - Prob. 22QFRCh. 14 - Prob. 23QFRCh. 14 - Prob. 24QFRCh. 14 - Prob. 1TQCh. 14 - Prob. 2TQCh. 14 - Prob. 3TQCh. 14 - Prob. 5TQCh. 14 - Prob. 7TQCh. 14 - Prob. 8TQCh. 14 - Prob. 9TQCh. 14 - Prob. 10TQCh. 14 - Prob. 1PCh. 14 - Prob. 2PCh. 14 - Prob. 3PCh. 14 - Prob. 4PCh. 14 - Prob. 5PCh. 14 - Prob. 6PCh. 14 - Prob. 7PCh. 14 - Prob. 8PCh. 14 - Prob. 9PCh. 14 - Prob. 1TYCh. 14 - Prob. 2TYCh. 14 - Prob. 3TYCh. 14 - Prob. 4TYCh. 14 - Prob. 5TYCh. 14 - Prob. 6TYCh. 14 - Prob. 7TYCh. 14 - Prob. 8TYCh. 14 - Prob. 9TYCh. 14 - Prob. 10TYCh. 14 - Prob. 11TY
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- How would two stars of equal luminosity-one blue and the other red-appear in an image taken through a filter that passes mainly blue light? How would their appearance change in an image taken through a filter that transmits mainly red light?arrow_forwardAre supergiant stars also extremely massive? Explain the reasoning behind your answer.arrow_forwardAt the average density of the interstellar medium, 1 atom per cm3, how big a volume of material must be used to make a star with the mass of the Sun? What is the radius of a sphere this size? Express your answer in light-years.arrow_forward
- Our Sun, a type G star, has a surface temperature of 5800 K. We know, therefore, that it is cooler than a type O star and hotter than a type M star. Given what you learned about the temperature ranges of these types of stars, how many times hotter than our Sun is the hottest type O star? How many times cooler than our Sun is the coolest type M star?arrow_forwardUse the diagram you have drawn for Exercise 18.25 to answer the following questions: Which star is more massive-Sirius or Alpha Centauri? Rigel and Regulus have nearly the same spectral type. Which is larger? Rigel and Betelgeuse have nearly the same luminosity. Which is larger? Which is redder?arrow_forwardReview this spectral data for five stars. Which is the hottest? Coolest? Most luminous? Least luminous? In each case, give your reasoning.arrow_forward
- If you were to compare three stars with the same surface temperature, with one star being a giant, another a supergiant, and the third a main-sequence star, how would their radii compare to one another?arrow_forwardWe will take a moment to compare how brightly a white dwarf star shines compared to a red giant star. For the sake of this problem, lets assume a white dwarf has a temperature roughly twice as large as a red giant star. As for their stellar radii, the white dwarf has a radius about 1/10000th that of a red giant star. With this in mind, how does the luminosity of a red giant star compare to that of a white dwarf? (Put differently, find the ratio of their luminosities a.k.a. how many times more luminous is the red giant than the white dwarf? An answer of less than 1 means the white dwarf is more luminous, an answer of 1 means they have the same luminosity, and an answer greater than 1 means the red giant is more luarrow_forward
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