UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
11th Edition
ISBN: 9781319278670
Author: Freedman
Publisher: MAC HIGHER
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Chapter 8, Problem 46Q
(a)
To determine
The wavelength at which the planet of HD 209458 emits most strongly, considering that the planet is a blackbody which has a surface temperature of 1130 K.
(b)
To determine
The maximum wavelength at which the star HD 209458 itself emits, considering that this star is a blackbody and has a surface temperature of 6030 K.
(c)
To determine
Whether it would be better for the high-resolution telescope to use visible or infrared light for recording an image of the planet orbiting HD209458.
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Chapter 8 Solutions
UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
Ch. 8 - Prob. 1CCCh. 8 - Prob. 2CCCh. 8 - Prob. 3CCCh. 8 - Prob. 4CCCh. 8 - Prob. 5CCCh. 8 - Prob. 6CCCh. 8 - Prob. 7CCCh. 8 - Prob. 8CCCh. 8 - Prob. 9CCCh. 8 - Prob. 10CC
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- When astronomers found the first giant planets with orbits of only a few days, they did not know whether those planets were gaseous and liquid like Jupiter or rocky like Mercury. The observations of HD 209458 settled this question because observations of the transit of the star by this planet made it possible to determine the radius of the planet. Use the data given in the text to estimate the density of this planet, and then use that information to explain why it must be a gas giant.arrow_forwardIf the red glow around Antares is indeed produced by reflection of the light from Antares by dust, what does its red appearance tell you about the likely temperature of Antares? Look up the spectral type of Antares in Appendix J. Was your estimate of the temperature about right? In most of the images in this chapter, a red glow is associated with ionized hydrogen. Would you expect to find an H II region around Antares? Explain your answer.arrow_forwardReview Figure 21-11. Which molecules can Triton retain in its atmosphere? Figure 21-11 Loss of atmospheric gases. Dots represent the escape velocity and temperature of various Solar System bodies. The lines represent the typical highest velocities of molecules of various masses. The Jovian planets have high escape velocities and can hold onto even the lowest-mass molecules. Mars can hold only the more massive molecules, and the Moon has such a low escape velocity that even massive molecules can escape.arrow_forward
- Look at Figure 21-11. Which molecule(s) can escape from Earths gravity? From Mars? From Venus? Figure 21-11 Loss of atmospheric gases. Dots represent the escape velocity and temperature of various Solar System bodies. The lines represent the typical highest velocities of molecules of various masses. The Jovian planets have high escape velocities and can hold onto even the lowest-mass molecules. Mars can hold only the more massive molecules, and the Moon has such a low escape velocity that even massive molecules can escape.arrow_forwardIf you could visit another planetary system while the planets are forming, would you expect to see the condensation sequence at work, or do you think that process was most likely unique to our Solar System? How do the properties of the extrasolar planets discovered so far affect your answer? Do you expect the most planetary system in the Universe have analogs to our Solar System’s asteroid belt and Kuiper Belt? Would all planetary systems show signs of an age of heavy bombardment? If the solar nebula hypothesis is correct, do you think there are more planets in the Universe than stars? Why or why not?arrow_forwardThe equilibrium temperature for Saturn should be 82 K but it is found to be95 K. How much more energy is Saturn radiating into space than it is absorbing from theSun?arrow_forward
- Examine Table 18-2. What might a planets composition be if the planet formed in a region of the solar nebula where the temperature was about 1200 K?arrow_forwardHow close to Uranus would a spacecraft have to get to obtain the same resolution as in Example 12.1 with a camera that has an angular resolution of 2 arcsec?arrow_forwardWhat is the escape velocity is km/s from Jupiters exosphere, which begins about 993 km above the surface ? Assume the Gravitational constant is G= 6.67 x10-11m3 kg-1s-2, and that's Jupiter has a mass of 1.8999999999999998e+27kg and a radius of 68.0 x103kmarrow_forward
- On planet Mysterio, when the sun is directly overhead the optical depth equals one (τ=1) at an altitude of 6 km. The neutral gas density at this altitude is 7×1011 particles/cm3. The ionization cross-section and photon flux at the top of the atmosphere have average values of σi = 3×10-19 cm2 and Itop = 5×109 photons cm-2 s-1, respectively. Calculate the photo-ionization rate at an altitude of 6 km for these conditions. Report answer in scientific notation to 2 significant digits. The photo-ionization rate is _____. cm-3 s-1arrow_forwardwhat is d-h?arrow_forwardCalculate 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.arrow_forward
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