Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 9, Problem 6QAP
To determine
The reason why Pluto is considered dwarf Planet.
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Prominent on photos of Jupiter, is a large, reddish oval feature, named the Great Red Spot.
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While looking through the Mt. Palomar telescope, you discover a large planetary object orbited by a single moon. The moon orbits the planet every 7.35 hours with the centers of the two objects separated by a distance roughly 2.25 times the radius of the planet. Fellow scientists speculate that the planet is made of mostly iron. In fact, the media has dubbed it the ''Iron Planet'' and NASA has even named it Planet Hephaestus after the Greek god of iron. But you have your doubts. Assuming the planet is spherical and the orbit circular, calculate the density of Planet Hephaestus.
Chapter 9 Solutions
Understanding Our Universe
Ch. 9.1 - Prob. 9.1CYUCh. 9.2 - Prob. 9.2CYUCh. 9.3 - Prob. 9.3CYUCh. 9.4 - Prob. 9.4CYUCh. 9.5 - Prob. 9.5CYUCh. 9.6 - Prob. 9.6CYUCh. 9 - Prob. 1QAPCh. 9 - Prob. 2QAPCh. 9 - Prob. 3QAPCh. 9 - Prob. 4QAP
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- Titan has a radius of 2700.0 km and a mass of 1.4x1023kg. What is the escape velocity in km/s from Titans exosphere, which begins at about 1400 km above the surface? The gravitational constant is G= 6.67x10-11m3kg-1s-2arrow_forwardMercury has an orbit with semi-major axis a= 0.387AU and eccentricity e= 0.206 . Mercury is a slowly rotating planet with no atmosphere. What is the temperature of the subsolar point on Mercury at aphelion? What is the temperature of the subsolar point on Mercury at perihelion? (The ‘subsolar point’ is the location on the planet’s surface where the Sun is at the zenith.)arrow_forwardImagine that astronomers have just discovered a planet orbiting another star (other than the Sun), and they have reported the mass of the planet as 4.2 Jupiter-masses. Explain in a few words what this means.arrow_forward
- Orbital Radius and orbital period data for the four biggest moons of Jupiter are listed in the table below. The mass of the planet Jupiter is 1.9 × 1027 kg. Jupiter's Moon Period (s) Radius (m) T2/r3 Io 1.53×105 4.2×108 ? Europa 3.07×105 6.7×108 ? Ganymede 6.18×105 1.1×109 ? Callisto 1.44×106 1.9×109 ? What pattern do you observe in the last column of data? Which law of Kepler's does this seem to support?arrow_forwardGiven the following information on Jupiter's Galilean moons, (a) determine the average mass of Jupiter and (b) compare to the known value of 1.898 × 1027 kg. Jupiter's diameter is 1.40 × 105 km. Assume the diameter of Jupiter is 139,820 km. Period in Orbital Diameter in Name Days Jupiter Diameters lo 1.77 6.03 Europa 3.55 9.60 anymede 7.16 15.3 Callisto 16.7 26.9arrow_forwardThe Great Red Patch is the name given to Jupiter's large red spot.Is it possible to forecast how long it will take for the planet to complete its rotation?arrow_forward
- Assume these are the mass and radius of Venus. Myenus = 5 x 1024 kg, Ryenus = 6,000,000 meters. What is the velocity required to put a satellite into stable orbit around Venus starting from the surface of Venus so that it orbits once every 24 hours? [ignore the rotational velocity of Venus and gravity of the Sun] 10.23 km/s 9.95 km/s 10.35 km/s O 10.14 km/s 10.06 km/sarrow_forwardNeptune has a mass of 1.0 × 1026 kg and is 4.5 × 109 km from the Sun with an orbital period of 165 years. Planetesimals in the outer primordial solar system 4.5 billion years ago coalesced into Neptune over hundreds of millions of years. If the primordial disk that evolved into our present day solar system had a radius of 1011 km and if the matter that made up these planetesimals that later became Neptune was spread out evenly on the edges of it, what was the orbital period of the outer edges of the primordial disk?arrow_forwardNeptune has a mass of 1.0 ✕ 1026 kg and is 4.5 ✕ 109 km from the Sun with an orbital period of 165 years. Planetesimals in the outer primordial solar system 4.5 billion years ago coalesced into Neptune over hundreds of millions of years. If the primordial disk that evolved into our present day solar system had a radius of 1011 km, and if the matter that made up these planetesimals that later became Neptune was spread out evenly on the edges of it, what was the orbital period (in years) of the outer edges of the primordial disk? yrarrow_forward
- Neptune has a mass of 1.0 ✕ 1026 kg and is 4.5 ✕ 109 km from the Sun with an orbital period of 165 years. Planetesimals in the outer primordial solar system 4.5 billion years ago coalesced into Neptune over hundreds of millions of years. If the primordial disk that evolved into our present day solar system had a radius of 1011 km, and if the matter that made up these planetesimals that later became Neptune was spread out evenly on the edges of it, what was the orbital period (in years) of the outer edges of the primordial disk?arrow_forwardConsider a spherical asteroid with radius 28.2 km and mass of 5.69 x 1018 kg. The acceleration due to gravity at the surface of the asteroid is ? Possibly useful: Fg=Gm1m2/r2 G=6.67 x 10-11 Nm2/kg2arrow_forwardCalculate the angular velocity (in rad/s) of Jupiter about its axis of rotation. (Enter the magnitude.)arrow_forward
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