Stars and Galaxies
9th Edition
ISBN: 9781305120785
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 3, Problem 9LL
To determine
Does the color of the chromosphere in figure is falsely colored ruby red.
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Calculate the total amount of radiative energy per second intercepted by Mars from the Sun using the flux of radiation from the Sun at Mars' orbital radius.
Flux of radiation from the Sun at Mars' orbital radius is 597 W m-2.
The luminosity of the Sun Ls = 3.8×1026 W.
Mars orbits at a distance of 2.25×1011 m (1.5 AU) from the Sun.
Note: Consider carefully the cross-sectional area Mars presents to the outwards flow of radiative energy when answering this question.
In the graph below, the yellow region shows the AM 1.5 solar spectrum. The area indicated by the blue area represents the AM 1.0 spectrum. The boundaries of the AM 1.0 spectrum;
When λ = between 250nm and 1000nm Pλ = 1x109Wm^(-2) m^(-1)
When λ = between 1000nm and 2000nm Pλ = 0.25x109W m^(-2) m^(-1)
In that case;
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1 Solar constant, Sun, and the 10 pc distance!
The luminosity of Sun is + 4- 1026 W - 4- 1033ergs-1, The Sun is located at a distance of
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1AU 1 1.5-+ 1011
Chapter 3 Solutions
Stars and Galaxies
Ch. 3 - Prob. 1RQCh. 3 - Prob. 2RQCh. 3 - Prob. 3RQCh. 3 - Prob. 4RQCh. 3 - Prob. 5RQCh. 3 - Prob. 6RQCh. 3 - Prob. 7RQCh. 3 - Prob. 8RQCh. 3 - Prob. 9RQCh. 3 - Prob. 10RQ
Ch. 3 - Prob. 11RQCh. 3 - Prob. 12RQCh. 3 - Prob. 13RQCh. 3 - Why do solar eclipses happen only at new moon? Why...Ch. 3 - Prob. 15RQCh. 3 - Prob. 16RQCh. 3 - What is the angular diameter of the Moon in the...Ch. 3 - Why cant the Moon be eclipsed when it is halfway...Ch. 3 - Prob. 19RQCh. 3 - Prob. 20RQCh. 3 - Prob. 21RQCh. 3 - Prob. 22RQCh. 3 - Pretend the Moons orbit around Earth is a perfect...Ch. 3 - Prob. 2PCh. 3 - Prob. 3PCh. 3 - Prob. 4PCh. 3 - Prob. 5PCh. 3 - Prob. 6PCh. 3 - Prob. 7PCh. 3 - Prob. 8PCh. 3 - Prob. 9PCh. 3 - Prob. 10PCh. 3 - Prob. 11PCh. 3 - Examine the list of upcoming lunar eclipses in...Ch. 3 - Prob. 13PCh. 3 - Prob. 14PCh. 3 - Prob. 15PCh. 3 - When will the eclipse described in Problem 15 next...Ch. 3 - Prob. 17PCh. 3 - Prob. 18PCh. 3 - Prob. 1LLCh. 3 - Prob. 2LLCh. 3 - Prob. 3LLCh. 3 - Prob. 4LLCh. 3 - Prob. 5LLCh. 3 - Prob. 6LLCh. 3 - Prob. 7LLCh. 3 - Prob. 9LLCh. 3 - Prob. 10LLCh. 3 - Prob. 11LLCh. 3 - Prob. 12LL
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- (a) The colour temperature can be determined from two magnitudes corresponding to two different wavelengths. Show that: 7000 K Te (B-V)+0.47 The wavelengths ofthe B and V bands are 440 nm and 548 nm, respectively, and we assume that B=V for stars of the spectral class A0, the colour temperature of which is about 15000 K°. (Take constant value - 0.73 and e-2.718).arrow_forwardAs a star runs out of hydrogen to fuel nuclear fusion in its core, changes within the star usually cause it to leave the main sequence, expanding and cooling as it does so. Would a star with a radius 6 times that of the Sun, but a surface temperature 0.4 times that of the Sun, be more, or less luminous than the Sun? Show and explain your reasoning. You may assume the surface area of a sphere is A = 4πr2.arrow_forwardIf the atmosphere were twice as thick as it currently is (extending farther into space), what effect would this have on the color the sun would appear to be? It would look whiter It would look redder It would have no effect O It would look bluerarrow_forward
- Use Wien's Law to calculate the peak wavelength of light coming from the Sun. Assume T=5800 K for the surface temperature of the Sun. Wein's displacement law says that the blackbody temperature and peak wavelength multiplied together give a constant of 0.29 cm-K. (K is degrees Kelvin). Convert the wavelength from part A into a frequency. The product of wavelength and frequency for electromagnetic radiation is a constant, the speed of light (c), 3 x 10^10 cm/s.arrow_forwardYour research team analysis the light of a mysterious object in space. By using a spectrometer,you can observe the following spectrum of the object. The Hα line peak is clearly visible. Answer the questions from given graph (a) Mark the first four spectral lines of hydrogen (Hα, Hβ, Hγ, Hδ) in the spectrum.(b) Determine the radial velocity and the direction of the object’s movement.(c) Calculate the distance to the observed object.(d) What possible type of object is your team observing?arrow_forward
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