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In what ways do the terrestrial and jovian planets differ?
- 1. The terrestrial worlds have few or no moons while the jovian have many.
- 2. The orbits of the terrestrial worlds are relatively close together, while the jovian ones are far apart.
- 3. The terrestrial worlds are small and dense while the jovian ones are gaseous.
- 4. The terrestrial planets that do have atmospheres have ones made of heavier compounds in general than those of the jovian ones.
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What three planets have retrograde rotations about their axes? (with Pluto being a planet)
Venus, Uranus, and Pluto
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How long does it take for light from the sun to reach the orbit of Pluto, 40 astronomical units away?
5.6 hours
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What is a characteristic of a terrestrial planet?
Lower density than that of jovian planets.
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Where in the solar system does the asteroid belt lie?
Between the orbits of Mars and Jupiter
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Which of the orbits of the solar system planets have the largest tilts with respect to the ecliptic plane?
Mercury and Pluto (7 degrees and 17 degrees)
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Which of the planets has the highest mass?
Jupiter.
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What is the only spacecraft to have visited four planets in the solar system so far?
Voyager 2
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What fraction of the total mass of the solar system is contained in the Sun itself?
99.9 percent
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Which of these planets has the lowest mass: Earth, Mars, Mercury, Venus, or Neptune?
Mercury
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