The rings of Uranus were discovered a. during an occultation (an eclipse) of a star. b. during an eclipse of one of the moons by the rings. c. during an eclipse of Uranus by the rings. d. as Uranus and the rings passed behind Jupiter. e. by the Voyager 1 spacecraft.
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The rings of Uranus were discovered
a. during an occultation (an eclipse) of a star.b. during an eclipse of one of the moons by the rings.c. during an eclipse of Uranus by the rings.d. as Uranus and the rings passed behind Jupiter.e. by the Voyager 1 spacecraft.
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- Calculate the Roche radius (in km) for Uranus. The diameter of Uranus is 5.11 ✕ 104 km.Although Deimos is smaller than Phobos, Deimos has more debris on its surface. This difference in the two moons is probably the result of a. the greater number of impact craters on Deimos. b. Martian gravity, which is strong enough to pull debris off the surface of Phobos. c. the lack of volcanic activity on the surface of Phobos. d. the comparatively weaker gravity on Deimos. e. the slower rotation rate of Deimos on its axis.4) Science fiction movies often portray asteroid belts as crowded, dense regions that require spaceships to maneuver quickly to get through them. In this problem, we will calculate the fraction of volume in an asteroid belt that is actually occupied by asteroids. a) If there are 300,000 large asteroids between 2 and 3 AU from the Sun, and each asteroid is assumed to be spherical with a radius of 100 km, determine the total volume occupied by asteroids in this region. Recall that the volume of a sphere is given by the equation V = 4TR³ /3. b) Let's assume the region in which these asteroids orbit is an annulus with an inner radius of 2 AU, an outer radius of 3 AU, and a thickness of 2Ro. Determine the volume of this region. Recall that the area of a circle is given by the equation A = TR². Here are two conversions that you'll need: 1 AU = 1.496 × 108 km and 1 Ro = 6.955 × 105 km. c) What is the ratio of the volume occupied by asteroids to the volume of the asteroid belt (i.e., the…
- 6 Why isn't there a planet where the asteroid belt is located? A The temperature in this portion of the solar nebula was just right to prevent rock from sticking together. B C D There was too much rocky material to form a terrestrial planet, but not enough gaseous material to form a jovian planet. There was not enough material in this part of the solar nebula to form a planet. Gravitational tugs from Jupiter prevented material from collecting together to form a planet. E A planet once formed here, but it was broken apart by a catastrophic collision.Calculate the escape velocity of Titan.14. Saturn's rings a. were created by its incredibly large gravitational capture of asteroids and comets b. have looked basically the same since they formed along with Saturn c. are continually supplied by impacts into small moons d. were created long ago when tidal forces tore apart a large moon
- Jupiter is slightly larger than Saturn but its density is about 2 times the density of Saturn. The reason for this density difference is a. Jupiter's higher mass and gravity compress its interior more b. Jupiter is more compressed by Sun's gravity c. Jupiter has larger volume d. Jupiter has larger proportions of rocks and metal6a. Calculate the surface temperature of Pluto and Charon at perihelion, assuming both bodies are rapid rotators and in equilibrium with the solar radiation field. b. Calculate the escape velocity from Pluto and Charon, and compare these numbers with the velocity of N2, CH4, and H2O molecules. c. Given your answers in (a) and (b), explain qualitatively the differences in surface ice coverage for Pluto and Charon.
- ____ daysWhen far from the Sun, a comet consists only of its a. nucleus b. dust tail c. gas tail d. coma18. From where do comets originate?A. Just outside the orbit of JupiterB. A belt between Jupiter and MarsC. between the orbits of Saturn and UranusD. From the surrounding outer regions of the solar system