Foundations of Astronomy (MindTap Course List)
14th Edition
ISBN: 9781337399920
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 20, Problem 13P
Suppose you send a probe to land on Mercury, and the probe transmits radio signals to Earth at a wavelength of 10.0000 cm. You listen for the probe when Mercury is moving away from Earth at its full orbital velocity of 48 km/s around the Sun. What wavelength would have to tune your radio telescope to detect that signal? (Hint: Use the Doppler shift formula, Eq. 7-3.) (Note: The
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Suppose you send a probe to land on Mercury, and the probe transmits radio signals to Earth at a wavelength of 59.0000 cm. You listen for the probe when Mercury is moving away from Earth at its full orbital velocity of 48 km/s around the sun. What wavelength (in cm) would you have to tune your radio telescope to detect the signal? (Hint: Use the Doppler shift formula .) (Note: the speed of light if 3.0 x 10^5 km/s. Give your answer to at least four decimal places.)
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At an average opposition, the Earth and Mars are separated by 0.52 AU. Suppose an astronomer
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Chapter 20 Solutions
Foundations of Astronomy (MindTap Course List)
Ch. 20 - How does the force of gravity cause tidal coupling...Ch. 20 - As viewed from Earth, how many times does the Moon...Ch. 20 - If the Moon is tidally coupled to Earth, is Earth...Ch. 20 - How can you determine the relative ages of the...Ch. 20 - From looking at images of the Moons near side, how...Ch. 20 - Why did the first Apollo missions land on the...Ch. 20 - Why do planetary scientists hypothesize that the...Ch. 20 - Prob. 8RQCh. 20 - Prob. 9RQCh. 20 - Prob. 10RQ
Ch. 20 - What is the most significant kind of erosion that...Ch. 20 - Provide evidence to support a hypothesis about...Ch. 20 - What evidence can you cite that the Moon had...Ch. 20 - What evidence would you expect to find on the Moon...Ch. 20 - How does the large-impact hypothesis explain the...Ch. 20 - Look at the Celestial Profiles for Earth, the...Ch. 20 - Look at the Celestial Profiles for the Moon and...Ch. 20 - Prob. 18RQCh. 20 - Look at the Celestial Profiles for Earth, the...Ch. 20 - Look at the Celestial Profiles for the Moon and...Ch. 20 - Why are features like the Moons maria not observed...Ch. 20 - What are the relative ages of the intercrater...Ch. 20 - What evidence can you give that Mercury has a...Ch. 20 - Why is it not surprising that there is no evidence...Ch. 20 - What evidence can you give that Mercury had...Ch. 20 - How are the histories of the Moon and Mercury...Ch. 20 - What property of the Moon and Mercury has resulted...Ch. 20 - Prob. 28RQCh. 20 - Look at the right top and bottom images in Figure...Ch. 20 - Calculate the escape velocity of the Moon from its...Ch. 20 - Prob. 3PCh. 20 - Why do small planets cool faster than large...Ch. 20 - The smallest detail visible through Earth-based...Ch. 20 - Prob. 6PCh. 20 - The trenches where Earths seafloor slips downward...Ch. 20 - An Apollo command module orbited the Moon about...Ch. 20 - Prob. 9PCh. 20 - What is the angular diameter of Mercury when it is...Ch. 20 - If you transmit radio signals to Mercury when...Ch. 20 - What is the wavelength of the most intense...Ch. 20 - Suppose you send a probe to land on Mercury, and...Ch. 20 - The smallest detail visible through Earth-based...Ch. 20 - Prob. 1SOPCh. 20 - Prob. 2SOPCh. 20 - Look at the image of the astronaut on the Moon at...Ch. 20 - In the photo shown here, astronaut Alan Bean works...Ch. 20 - Examine the shape of the horizon at the Apollo 17...
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- Suppose you send a probe to land on Mercury, and the probe transmits radio signals to earth at a wavelength of 52.0000 cm. You listen for the probe when Mercury is moving away from Earth at its full orbital velocity of 48 km/s around the Sun. What wavelength (in cm) would you have to tune your radio telescope to detect that signal? Use the doppler shift formula Note: the speed of light is 3.0 ✕ 105 km/s. Give your answer to at least four decimal places.)arrow_forwardWhat is the maximum angular diameter of the dwarf planet Ceres when it is closest to Earth? Could Earth-based telescopes detect surface features? Could the Hubble Space Telescope? (Hint: Use the small-angle formula, Eq. 3-1.) (Notes: Ceress average distance from the Sun is 2.8 AU and its diameter is 950 km. The best angular resolution of Earth-based telescopes at visual wavelengths is about 1 arc second and of Hubble about 0.1 arc second.)arrow_forwardVenus can be as bright as apparent magnitude 4.7 when at a distance of about 1 AU. How many times fainter would Venus look from a distance of 1 pc? What would its apparent magnitude be? Assume Venus has the same illumination phase from your new vantage point. (Hints: Recall the inverse square law, Section 9-2a; also, review the definition of apparent visual magnitudes, Chapter 2.) (Note: 1 pc = 2.1 105 AU.)arrow_forward
- How can planetary scientists estimate the ages of the outflow channels and valley networks on Mars?arrow_forwardThe 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.arrow_forwardWhat is the wavelength (in nm) of the most intense radiation emitted from the surface of mercury at high noon? (Hint: use Wiens law) _______ nm In which band of the electromagnetic spectrum is that wavelength? A: gamma ray B:X-ray C: ultraviolet D: visual E: infrared F: microwave G: radioarrow_forward
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- Venus can be as bright as apparent magnitude −4.7 when at a distance of about 1 AU. How many times fainter would Venus look from a distance of 7 pc? Assume Venus has the same illumination phase from your new vantage point. (Hints: Recall the inverse square law; also, review the definition of apparent visual magnitudes. Note: 1 pc = 2.1 ✕ 105 AU). What would its apparent magnitude be?arrow_forwardK What is the wavelength (in nm) of the most intense radiation emitted from the surface of Mercury at high noon? (Hint: Use Wien's law, Amax = 2.90 x 10° m: K %3D T (in K) nm In which band of the electromagnetic spectrum is that wavelength? (Hint: Examine the following figure.) Visible light Short wavelengths Long wavelengths 4 x 107 5x 107 6x 107 7x 10meters (400 nm) (500 nm) (600 nm) /(700 nm) Wavelength (meters) 10 12 10 10 10 104 102 1 102 104 Gamma- ray Ultra- violet Micro- Radio X-ray Infrared wave UHF VHF FM AM a Opaque Visual window Radio window Transparent Short Wavelength Long b O gamma-ray O X-ray O ultraviolet O visual O infrared O microwave O radio оооо о оо Opacity of Earth's atmospherearrow_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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