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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Chapter 9, Problem 3P
To determine
The time taken to send a radio signal to the spacecraft at Venus when it is the closest to Earth.
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The average distance to Mars is 1.5 AU. If you send a command using radio waves (a form of light!) to a rover on the Mars surface, how long will you have to wait before you receive the response? Assume the probe responds immediately after it receives the command.
Assume 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.
If we moved Venus out to 1 AU from the Sun (same as Earth), Venus would probably
a.
become more like Earth, with oceans and a temperate climate
b.
remain hot, dry, and dead because it's permanently lost its oceans
c.
become more like Mars, losing most of its atmosphere and freezing
d.
become much less geologically active due to decreased solar heating
Chapter 9 Solutions
Loose Leaf For Explorations: Introduction To Astronomy
Ch. 9 - How do Mercury, Venus, and Mars each compare with...Ch. 9 - How do the interior structures of Mercury, Venus,...Ch. 9 - What is the surface of Mercury like?Ch. 9 - Does Mercury have an atmosphere? Why or why not?Ch. 9 - Prob. 5QFRCh. 9 - What is the dominant gas in Venuss atmosphere? How...Ch. 9 - What are the clouds of Venus made of?Ch. 9 - Why is Venus so hot?Ch. 9 - Can we see the surface of Venus? Why or why not?...Ch. 9 - Prob. 10QFR
Ch. 9 - Prob. 11QFRCh. 9 - What are the Martian polar caps composed of?Ch. 9 - (9.3) What is the Martian atmosphere like?Ch. 9 - What is the evidence that Mars once had running...Ch. 9 - Prob. 15QFRCh. 9 - Prob. 16QFRCh. 9 - Prob. 17QFRCh. 9 - Prob. 18QFRCh. 9 - Prob. 1TQCh. 9 - Prob. 2TQCh. 9 - Prob. 3TQCh. 9 - Prob. 4TQCh. 9 - Prob. 5TQCh. 9 - Prob. 6TQCh. 9 - Prob. 7TQCh. 9 - Prob. 8TQCh. 9 - What role might planetesimal impacts have played...Ch. 9 - Prob. 1PCh. 9 - Prob. 2PCh. 9 - Prob. 3PCh. 9 - Prob. 4PCh. 9 - Olympus Mons is 26 kilometers above the...Ch. 9 - Prob. 6PCh. 9 - Prob. 1TYCh. 9 - Prob. 2TYCh. 9 - Prob. 3TYCh. 9 - Prob. 4TYCh. 9 - Prob. 5TYCh. 9 - Prob. 6TYCh. 9 - Prob. 7TYCh. 9 - Prob. 8TY
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- Describe two anomalous features of the rotation of Venus and what might account for them.arrow_forwardThe runaway greenhouse effect and its inverse, the runaway refrigerator effect, have led to harsh, uninhabitable conditions on Venus and Mars. Does the greenhouse effect always cause climate changes leading to loss of water and life? Give a reason for your answer.arrow_forwardExplain the differences between the Grand Canyon on Earth and Valles Marineris on Mars.arrow_forward
- What evidence is there that Venus was volcanically active about 300600 million years ago?arrow_forwardWhy is there so much more carbon dioxide in the atmosphere of Venus than in that of Earth? Why so much more carbon dioxide than on Mars?arrow_forwardWhich of the following properties of Mars would be altered by the process of terraforming? its size its atmospheric chemistry its distance from the Sun its geological activity its magnetic field Even if we were to terraform Mars to give it an Earthlike climate, that climate would not be as stable as Earth's, due to Mars's lack of a large moon volcanic activity an iron core atmospheric nitrogenarrow_forward
- How long would it take radio signals to travel from Earth to Venus and back if Venus were at its nearest approach to Earth?arrow_forwardPart of the "Mars Direct" mission plan involves rotating the spacecraft on its way to Mars to provide the astronauts with a simulation of Martian gravity. True False Due to the need to catch the correct launch window for the trip home, the total duration for a round trip to Mars will have to be at most 18 months at least 18 months at least 30 months at most 12 months at least 24 monthsarrow_forwardOn the night side of Venus, we find that the brightest wavelength, that is the wavelength this region of the planet is emitting the most energy, is about 3.9 micrometres (3.9x10-6 meters). Approximately how warm is the planet in this region?arrow_forward
- What is the escape velocity is km/s from Venus' exosphere, which begins about 202 km above the surface ? Assume the gravitational constant is G= 6.67 x10-11m3 kg-1s-2, and that's Venus has a mass of 5.2e+24 kg and a radius of 6500.0 kmarrow_forwardHow long, deep, and wide would a terrestrial chasm have to be to have the same proportions relative to the Earth that Valles Marineris has to Mars?arrow_forwardmake a model of how CO, keeps heat ( infrared radiation) trapped in an atmosphere. Revisit the question on why the temperature is lower on Mars than earth and on Earth than Venusarrow_forward
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