Problem 1RCQ: How many known planets are in our solar system? Problem 2RCQ: What dwarf planet was downgraded from planetary status in 2006? Problem 3RCQ: How are the outer planets different from the inner planets aside from their location? Problem 4RCQ: Why does a nebula spin faster as it contracts? Problem 5RCQ: According to the nebular theory, did the planets start forming before or after the Sun ignited? Problem 6RCQ Problem 7RCQ: What are sunspots? Problem 8RCQ: What is the solar wind? Problem 9RCQ: How does the rotation of the Sun differ from the rotation of a solid body? Problem 10RCQ Problem 11RCQ: Why are the days on Mercury very hot and the nights very cold? Problem 12RCQ: What two planets are evening or morning stars? Problem 13RCQ: Why is Earth called the blue planet? Problem 14RCQ: What gas makes up most of the Martian atmosphere? Problem 15RCQ: What evidence tells us that Mars was at one time wetter than it presently is? Problem 16RCQ: What surface feature do Jupiter and the Sun have common? Problem 17RCQ: Which move faster: Saturns inner rings or the outer rings? Problem 18RCQ: How tilted is Uranuss axis? Problem 19RCQ: Why is Nepcune bluer than Uranus? Problem 20RCQ: Why doesnt the Moon have an atmosphere? Problem 21RCQ: Where is the Sun located when you view a fall Moon? Problem 22RCQ: Where are the Sun and the Moon located at the time of a new Moon? Problem 23RCQ: Why dont eclipses occur monthly, or nearly monthly? Problem 24RCQ: How does the Moons rate of rotation about its own axis compare with its rate of revolution around... Problem 25RCQ: Between the orbits of what two planets is the asteroid belt located? Problem 26RCQ: What is the difference between a meteor and a meteorite? Problem 27RCQ: What is the Kuiper belt? Problem 28RCQ: What is the Oort cloud, and what is it noted for? Problem 29RCQ Problem 30RCQ: What causes comet tails to point away from the Sun? Problem 37TAS: Knowing that the speed of light is 300,000 km/s, show that it takes about 8 min for sunlight to... Problem 38TAS: How many days does sunlight take to travel the 50,000 AU from the Sun to the outer reaches of the... Problem 39TAS: The light-year is a standard unit of distance used by astronomers. It is the distance light travels... Problem 40TAS: The nearest star to our Sun is Alpha Centauri, which is about 4.4 light-years away. Assume that it... Problem 41TAS: If the Sun were the size of a beach ball, Earth would be the size of a green pea 110 m away. Show... Problem 42TAR: Rank these planets in order from longest to shortest year: (a) Mercury, (b) Venus, and (c) Earth. Problem 43TAR: Rank these planets in order of increasing number of moons: (a) Mars, (b) Venus, and (c) Earth. Problem 44TAR: Rank in order of increasing average density: (a) Jupiter, (b) Saturn, and (c) Earth. Problem 45TAR: Rank in order of increasing pressure at the center of each planet: (a)Jupiter, (b) Saturn, and (c)... Problem 46TAR: Rank in order of decreasing number of people who have seen a: (a) solar eclipse, (b) lunar eclipse,... Problem 47TAR: Rank in order of increasing average distance from the Sun: (a) Kuiper belt objects, (b) asteroids,... Problem 48E: According to the nebular theory, what happens to a nebula as it contracts under the force of... Problem 49E Problem 50E: When a contracting ball of hot gas spins into a disk shape, it cools. Why? Problem 51E: If Earth didnt spin on its axis but still revolved around the Sun, how long would a day be on Earth? Problem 52E: If Earth didnt spin on its axis but still revolved around the Sun, would the Sun set on the eastern... Problem 53E: Which tends to be larger: a star or a nebula? Which tends to be denser? Which tends to be easier to... Problem 54E Problem 55E Problem 56E Problem 57E: Explain why the radiation zone is more dense than the convection zone. Problem 58E: Explain how energy is transported from the Sun's core through the radiation zone. Problem 59E: Explain how energy is transported outward through the convection zone. Problem 60E: The greenhouse effect is very pronounced on Venus but doesn't exist on Mercury. Why? Problem 61E: What is the cause of winds on Mars (and also on nearly every other planet)? Problem 62E: Why is there so little wind on the surface of Venus? Problem 63E: If Venus were somehow transported into the habitable zone, would conditions once again become... Problem 64E: Mercury and Venus are never seen at night straight up toward the top of the sky Why not? Problem 65E: As evidenced in the photos that make up Figure 26.17, the sky when viewed from Mars is not blue, as... Problem 66E: What is the major difference between the terrestrial planets and the jovian planets? Problem 67E: What does Jupiter have in common with the Sun that the terrestrial planets don't? What... Problem 68E: When it comes to celestial bodies,such as planets and stars, why doesnt a larger size necessarily... Problem 69E: Why are the seasons on Uranus different from the seasons on any other planet? Problem 70E: Do all moons orbit in the same direction as the direction in which their planet spins? Problem 71E: Earth rotates much faster than Venus. How does the giant impact theory of the Moon account for this... Problem 72E: Why are many craters evident on the surface of the Moon but not on the surface of earth? Problem 73E: Why is there no atomosphere on the Moon? Defend your answer. Problem 74E: Is the fact that we see only one side of the Moon evidence that the Moon spins or that it doesn't?... Problem 75E: Photograph (a) shows the Moon partially lit by the Sun. Photograph (b) shows a Ping-Pong ball in... Problem 76E: We always see the same face of the Moon because the rotation of the Moon on its axis matches the... Problem 77E: Since we never see the back side of the Moon, would an observer on the back side of the Moon ever... Problem 78E: In what alignment of Sun, Moon, and Earth does a solar eclipse occur? Problem 79E: In what alignment of Sun, Moon, and Earth does a lunar eclipse occur? Problem 80E: What does the Moon have in common with a compass needle? Problem 81E: If you were on the Moon and you looked up and saw a full Earth, would it be nighttime or daytime on... Problem 82E: If you were on the Moon and you looked up and saw a new Earth, would it be nighttime or daytime on... Problem 83E: Earth takes 365.25 days to revolve around the Sun. If Earth took this same amount of time to spin on... Problem 84E: Astronomer using land-based telescopes must contend with glare from moonlight for about two weeks... Problem 85E: Nearly everybody has witnessed a lunar eclipse, but relatively few people have seen a total solar... Problem 86E: Because of Earth's shadow, a partially eclipsed Moon looks like a cookie with a bite taken out of it... Problem 87E: Use the following illustration to answer questions 8790. 87. Which of these three orientations of... Problem 88E: Use the following illustration to answer questions 87-90. 88. Assuming the above illustration... Problem 89E: Use the following illustration to answer questions 87-90. 89. Is the sailboat seen in the... Problem 90E: Use the following illustration to answer questions 87-90. 90. Where and how would the Moon be... Problem 91E: In what sense is Pluto a potential comet? Problem 92E: Smaller chunks of asteroids are sent hurling toward Earth much more frequently than larger chunks of... Problem 93E: Why are meteorites so much more easily found in Antarctica than in other continents? Problem 94E: A meteor is visible only once, but a comet may be visible at regular intervals throughout its... Problem 95E: What would be the consequence of a comets tail sweeping across Earth? Problem 96E: Chances are about 50-50 that in any night sky, there is at least one visible comet that has not been... Problem 97E: If the bulk of water on Earth didnt come from comets nor asteroids, then where did it come from? Problem 98DQ: Consider what human civilization would be like if Earth had no moon. Problem 99DQ: What are the chances that microbial life forms might one day be found elsewhere in our solar system?... Problem 100DQ Problem 1RAT Problem 2RAT: The solar system is like an atom in that both (a) are governed principally through the electric... Problem 3RAT: The nebular theory is based on the observation that the solar system (a) follows patterns indicating... Problem 4RAT: When a contracting hot ball of gas spins into a disk shape, it cools faster due to (a) increased... Problem 5RAT: Each second, the burning Sun's mass (a) increases. (b) remains unchanged. (c) decreases. Problem 6RAT: Compared to your weigh on Earth, your weight on Jupiter would be about (a) 3000 times as much. (b)... Problem 7RAT: When the Moon assumes its characteristic thin crescent shape, the position of the Sun is (a) almost... Problem 8RAT: When the Sun passes between the Moon and Earth, we have (a) a lunar eclipse. (b) a solar eclipse.... Problem 9RAT: Asteroids orbit (a) the Moon. (b) Earth. (c) the Sun. (d) all of the above (e) none of the above Problem 10RAT: With each pass of a comet about the Sun, the comets mass (a) remains virtually unchanged. (b)... format_list_bulleted