Answered: h of the following about comets is…

h of the following about comets is TRUE? a. Cometary orbits always lie close to the ecliptic plane b. Long period comets must originate from well beyond even the Kuiper Belt c. The Oort c

Horizons: Exploring the Universe (MindTap Course List)

14th Edition

ISBN:9781305960961

Author:Michael A. Seeds, Dana Backman

Publisher:Michael A. Seeds, Dana Backman

Chapter18: The Outer Solar System

Section: Chapter Questions

Problem 6P: If Uranus’s epsilon ring is 50 km wide and the orbital velocity of Uranus is 6.8 km/s, how long...

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Question

Which of the following about comets is TRUE?

		a. Cometary orbits always lie close to the ecliptic plane
		b. Long period comets must originate from well beyond even the Kuiper Belt
		c. The Oort cloud is the large cloud of gas surrounding a comet nucleus while it is near the Sun
		d. Tails of comets always lie along the path of the orbit

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2. Comet 1943 I has a period of 512 years and an eccentricity of 0.999914 and an inclination of 22 degrees. a. What is the comet's semi major axis? b. What are its perihelion and aphelion distances? c. What is the most likely source region of this object? d. What is its tisserand parameter and what does that tell you?
Short-period comets like Halley Comet a. return to the Oort Cloud during each of their orbits b. come back again and again at predictable intervals. c. have a long tail visiable during their entire orbit around the Sun d. can never be observed without a telescope e. you can't fool me, the only short-period comet we know is Halley
The short-period comets do NOT have randomly oriented orbits because a. they are affected by the sun’s gravity. b. they are affected by the solar wind. c. they formed in the Kuiper belt, a belt-shaped region in the plane of the solar system. d. their orbits are altered by the drag of their tails in the solar wind. e. they all were originally objects ejected from the asteroid belt.
When far from the Sun, a comet consists only of its a. nucleus b. dust tail c. gas tail d. coma
1. Suppose you have an Oort cloud comet on an orbit with pericenter distance 10,000 AU, and apocenter distance 20,000 AU. a. What are the semi-major axis and eccentricity of the orbit? b. What are the specific energy (energy per unit mass), and specific angular momentum (angular momentum per unit mass) of the comet? c. How fast is the comet moving at apocenter (relative to the Sun)?
The odd orbits of Nereid and Triton, which are moons of Neptune, indicate that these a. moons were captured. b. moons formed simultaneously with the planet from the same piece of the solar nebula. c. moons broke off from the rapidly rotating planet. d. moons formed as the result from a giant impact early in the planet’s history. e. orbits were disturbed long ago in an interaction with some other body.
Which of the following is least reasonable regarding comets? Group of answer choices Short-period comets originate in the Kuiper belt and take less than than about 200 years to orbit the Sun. Long-period comets originate in the Oort cloud and can take millions of years to orbit around the Sun, in randomly oriented orbital planes. The ion tail of a comet tends to produce a blue glow, as the ions inside it absorb sunlight and re-emit the absorbed energy with a characteristic color (somewhat like the gas atoms in a neon light or in an Aurora). An ion tail is typically narrow and straight and always trails the comet, like long hair in the wind. The dust tail of a comet often looks curved and its whitish color is just reflected sunlight.
The reason that most moons in our solar system orbit in all sorts of crazy directions is because most moons a. co-formed with their planets b. are the result of major collisions c. have been pulled into these crazy orbits by tidal forces d. are captured asteroids Tidal flexing will occur in a moon whose orbit is a. close to its planet and circular b. far from its planet and circular c. far from its planet and eccentric d. close to its planet and eccentric
Surprisingly, the New Horizons probe took pictures of Pluto and found a. ongoing volcanic eruptions b. mountain ranges c. lakes of methane d. a lot of impact craters Pluto and other "dwarf planets" are not considered proper planets because a. they don't have any moons b. they are members of belts like the asteroid and Kuiper belts c. they don't have atmospheres d. their orbital inclinations are too high e. their orbits are too eccentric Which of these planets has never had an artificial satellite? a. Neptune b. Saturn c. Mars d. Jupiter e. Venus
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The dwarf planet Pluto was discovered in 1930. Since that time, which jovian planet has completed a full revolution around the Sun? a. Jupiter b. Saturn c. Uranus d. Neptune e. More than one of the above