21st Century Astronomy And Learning Astronomy By Doing Astronomy (fifth Edition)
5th Edition
ISBN: 9780393613360
Author: Laura Kay, Ana Larson, Stacy Palen, George Blumenthal
Publisher: W. W. Norton & Company
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Chapter 9, Problem 16QP
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Explain why the primary atmosphere contained only hydrogen and helium.
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According to http://hyperphysics.phy-str.gsu.edu/hbase/solar/venusenv.html, the atmosphere of Venus is approximately 96.5% CO2 and 3.5% N2 by volume. On the surface, where the temperature is about 750 K and the pressure is about 90 atm, what is the density of the atmosphere?
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Planetary scientists are excited about the possibility that some of the moons in the outer solar system might have a global subsurface ocean of liquid water.
It's uncertain whether or not Jupiter's moon Callisto has a subsurface ocean, but some scientists think it might.
Let's imagine that a short distance below the surface, Callisto has a water layer 20,000 meters thick. Callisto has a radius of 2.410x106 meters.
Earth has a radius of 6.378x106 meters, and its oceans are equivalent to a layer of water 3000 meters thick all over the surface of the planet.
Which of the following is an accurate comparison of the Earth’s amount of liquid water with this estimate of the amount of water Callisto might have?
Group of answer choices
If this scenario is correct, Earth and Callisto have roughly the same amount of liquid water.
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Chapter 9 Solutions
21st Century Astronomy And Learning Astronomy By Doing Astronomy (fifth Edition)
Ch. 9.1 - Prob. 9.1CYUCh. 9.2 - Prob. 9.2CYUCh. 9.3 - Prob. 9.3CYUCh. 9.3 - Prob. 9.4CYUCh. 9.4 - Prob. 9.5CYUCh. 9.5 - Prob. 9.6CYUCh. 9 - Prob. 1QPCh. 9 - Prob. 2QPCh. 9 - Prob. 3QPCh. 9 - Prob. 4QP
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- Do you think the Moon could retain an atmosphere of nitrogen for the age of the Solar System? Explain why or why notarrow_forwardEvidence exists that Mars may have had oceans 0.500 km deep in its early history. We don't know what the atmospheric pressure on Mars was back then, but some studies suggest it may have been as high as 50,000 Pa. What would have been the highest pressure at the bottom of these oceans? Density of water is 1000 kg/m³, gmars = 3.71 m/s².arrow_forwardConsider the greenhouse effect in an atmosphere model consisting of two infrared-opaque layers. Find the temperatures of both layers and the temperature of the planet's surface.arrow_forward
- We think the terrestrial planets formed around solid “seeds” that later grew over time through the accretion of rocks and metals. a) Suppose the Earth grew to its present size in 1 million years through the accretion of particles averaging 100 grams each. On average, how many particles did the Earth capture per second, given that the mass of the Earth is = 5.972 × 10 ^24 kg ? b) If you stood on Earth during its formation and watched a region covering 100 m^2, how many impacts would you expect to see in one hour. Use the impact rate you calculated in part a. You’ll need the following as well: the radius of the Earth is = 6.371 × 10 ^6 m and the surface area of the Earth is 4??^2Eartharrow_forwardAssume that Venus has an isothermal atmosphere with a surface temperature of 750 K. The surface pressure of Venus is 90 times the Earth's surface pressure which is about 1013mb. Also assume that the carbon dioxide dominant atmosphere of Venus is photodissociated and oxygen atoms are produced. These oxygen atoms stop the solar wind at the ionopause distance where the atmospheric pressure of Venus and the dynamic pressure of the solar wind are in balance. Accordingly, calculate the lonopause distance of the planet Venus if the solar wind density is 7 #/cm² and solar wind speed is 410 km/sec.arrow_forwardLook 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_forward
- Why do small planets cool faster than large planets? Choose any two of the five Terrestrial worlds and calculate for each one the ratio of its surface area to its volume. Why is this ratio important? (Hint: Does this ratio have anything to do with the ability of a planet to lose internal heat?) (Note: The surface area of a sphere is 4r2, and the volume of a sphere is 43r3.)arrow_forwardDescribe sources and sinks of CO2, if any, on Venus today.arrow_forwardThe water clouds believed to be present on Jupiter and Saturn exist at temperatures and pressures similar to those in the clouds of the terrestrial atmosphere. What would it be like to visit such a location on Jupiter or Saturn? In what ways would the environment differ from that in the clouds of Earth?arrow_forward
- You decide to go on an interstellar mission to explore some of the newly discovered extrasolar planets orbiting the star ROTOR. Your spacecraft arrives in the new system, in which there are five planets. ROTOR is identical to the Sun (in terms of its size, mass, age and composition). From your observations of these planets, you collect the following data: Density Average Distance from star (AU] Planet Mass Radius Albedo Temp. [C] Surf. Press. MOI Rotation [Earth = 1] (Earth = 1] [g/cm³] [Atm.] Period (Hours] Factor SIEVER EUGENIA 4.0 0.001 2.0 0.1 5.0 1.0 0.3 20 0.8 N/A 3.0 0.2 N/A 0.3 0.4 0.35 20 10 500 1000 5.0 4.0 0.5 0.8 0.4 0.7 -50 MARLENE CRILE 1.0 1.0 3.0 8.0 1,5 0.0 0.50 0.50 0.25 150 0.4 JANUS 100 12 0.1 10 -80 0.2 200 Figure 1: А Rotor 850 890 900 Wavelength (nm) A Sun В C 860 900 910 Wavelength (nm) 2414 a asarrow_forward100% Normal text Arlal 12.5 | I1 1 | 2 | 3 3. Fill out this data table with information you have collected about the solar system planets. Characteristics Unit Mercury Venus Earth 330 4,870 5,970 Mass 1024 g 61 928 1,083 Volume 1024 cm3 5.4 5.4 50 Density g/cm3 58 106 km 100 100 Distance from Sun Radius km Crust Thickness km Atmosphere Height kmarrow_forwardThe clouds that surround Venus are so thick that the planet actually absorbs less sunlight than the Earth. Nevertheless, Venus has a surface temperature of more than 400 C. Which of these best explains this high surface temperature?arrow_forward
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