MasteringAstronomy with Pearson eText -- Standalone Access Card -- The Essential Cosmic Perspective (7th Edition)
7th Edition
ISBN: 9780321928726
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 2, Problem 15EAP
What do we mean by the apparent retrograde motion of the planets? Why was it difficult for ancient astronomers to explain but easy for us to explain?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
What do we mean by apparent retrograde motion of planets? Why was it difficult for ancient astronomers to explain? How do we explain it today?
Why Venus’ phase observation made it very difficult to argue against the heliocentric model.
What is retrograde motion? How did the geocentric theory explain these motions? How did the heliocentric theory explain these motions?
Chapter 2 Solutions
MasteringAstronomy with Pearson eText -- Standalone Access Card -- The Essential Cosmic Perspective (7th Edition)
Ch. 2 - Prob. 1VSCCh. 2 - Which of the four labeled points represents the...Ch. 2 - Which of the four labeled points represents the...Ch. 2 - The diagram exaggerates the sizes of Earth and the...Ch. 2 - Given that Earths actual distance from the Sun...Ch. 2 - As viewed from Earth, in which zodiac...Ch. 2 - If the date is April 21, what zodiac constellation...Ch. 2 - If the date is April 21, what zodiac constellation...Ch. 2 - Prob. 1EAPCh. 2 - Suppose you were making a model of the celestial...
Ch. 2 - On a clear, dark night, the sky may appear to be...Ch. 2 - Why does the local sky look like a dome? Define...Ch. 2 - Prob. 5EAPCh. 2 - What are circumpolar stars? Are more stars...Ch. 2 - What are latitude and longitude? Does the local...Ch. 2 - What is the zodiac, and why do we see different...Ch. 2 - Suppose Earth’s axis had no tilt. Would we still...Ch. 2 - Briefly describe key facts about the solstices and...Ch. 2 - What is precession? How does it affect our view of...Ch. 2 - Briefly describe the Moons cycle of phases. Can...Ch. 2 - Why do we always see the same face of the Moon?Ch. 2 - Why don’t we see an eclipse at every new and full...Ch. 2 - What do we mean by the apparent retrograde motion...Ch. 2 - Prob. 16EAPCh. 2 - Decide whether the statement makes sense (or is...Ch. 2 - Prob. 18EAPCh. 2 - Decide whether the statement makes sense (or is...Ch. 2 - Prob. 20EAPCh. 2 - Decide whether the statement makes sense (or is...Ch. 2 - Decide whether the statement makes sense (or is...Ch. 2 - Prob. 23EAPCh. 2 - Decide whether the statement makes sense (or is...Ch. 2 - Decide whether the statement makes sense (or is...Ch. 2 - Decide whether the statement makes sense (or is...Ch. 2 - Two stars that are in the same constellation (a)...Ch. 2 - The north celestial pole is 35° above your...Ch. 2 - Beijing and Philadelphia have about the same...Ch. 2 - In winter, Earth’s axis points toward the star...Ch. 2 - When it is summer in Australia, the season in the...Ch. 2 - If the Sun rises precisely due east. (a) you must...Ch. 2 - A week after full moon, the Moon’s phase is (a)...Ch. 2 - The fact that we always see the same face of the...Ch. 2 - If there is going to be a total lunar eclipse...Ch. 2 - When we see Saturn going through a period of...Ch. 2 - Prob. 37EAPCh. 2 - Prob. 38EAPCh. 2 - 39. Lunar Phases and Time of Day. Roles: Scribe...Ch. 2 - Prob. 40EAPCh. 2 - Your View of the Sky. a. What are your latitude...Ch. 2 - View from the Moon. Suppose you lived on the Moon,...Ch. 2 - View from the Sun. Suppose you lived on the Sun...Ch. 2 - Farther Moon. Suppose the distance to the Moon...Ch. 2 - Smaller Earth. Suppose Earth were smaller. Would...Ch. 2 - Prob. 46EAPCh. 2 - Prob. 47EAPCh. 2 - Find the Sun’s Diameter. The Sun has an angular...Ch. 2 - Prob. 49EAPCh. 2 - Prob. 50EAPCh. 2 - Prob. 51EAPCh. 2 - Flat Earth Society. Believe it or not, there is an...Ch. 2 - Prob. 53EAPCh. 2 - Prob. 54EAPCh. 2 - Prob. 55EAP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- One planet is three times farther from the Sun than another. Will the farther planet take more, less, or the same amount of time to orbit the Sun? Will the closer planet orbit slower, faster, or the same speed? How much longer will the farther planet take to orbit than the closer planet? If the closer planet is located at 10 AU, how far is the farther planet, and what are the two planet's names?arrow_forwardAccording to Kepler’s second law, where in a planet’s orbit would it be moving fastest? Where would it be moving slowest?arrow_forwardGive me the right answer please and thank you, take your timeCalculate the amount of time it takes for light reflected off the surface of a distant planet to reach us.1. Sunlight takes about 8.3 minutes to travel from the Sun to Earth. What is the Sun-Earth distance in AU? (Give your answer rounded to the nearest AU).2.Light is reflected off the surface of a planet 5.2 AU away from us. How long does it take this light to reach us from the planet? Give your answer in minutes, rounded to exactly one decimal place.arrow_forward
- Let's use Kepler's laws for the inner planets. Use the following distances from the sun to calculate the orbital period for each of these planets. Express your answer in terms of Earth years to two significant figures. Answer for the highlighted planet in each question. Note: Use Kepler's law directly. Don't just Google the answers, as they will be a little bit different. When you have calculated them, only submit the value for Earth. Planet Distance from the sun Period of orbit around the sun Earth 150 million km ___ Earth years Mercury 58 million km ___ Earth years Venus 108 million km ___ Earth years Mars 228 million km ___ Earth yearsarrow_forwardLet's use Kepler's laws for the inner planets. Use the following distances from the sun to calculate the orbital period for each of these planets. Express your answer in terms of Earth years to two significant figures. Note: Use Kepler's law directly. Don't just Google the answers, as they will be a little bit different. When you have calculated them, only submit the value for Mercury. Planet Distance from the sun Period of orbit around the sun Earth 150 million km ___ Earth years Mercury 58 million km ___ Earth years Venus 108 million km ___ Earth years Mars 228 million km ___ Earth yearsarrow_forwardWhy do we observe phases of the inner planets but not the outer planets. Provide examples, and describe the phases(use the names of the relevant lunar phases,such as waxing gibbous, banning crescent, this quarter, new. full, etc)of the inner planets dependently on their location relatively to the Sun and the Earth. Particularly specify the cases of the greatest eastern and western elongations on the Venus's example , and describe phase of Venus as it is seen from Earth during those two configurations.arrow_forward
- Given the geometry shown in the picture, can you figure out where the planet is when it is moving the fastest and when it is moving the slowest? Explain your reasoning as clearly as you can.arrow_forwardDescribe the retrograde motion of mars and how it was explained in terms of both a heliocentric and geocentric model of the solar system. Key terms to be included: relative velocitys of earth and mars, background stars and epicyclesarrow_forwardYou land on a strange spherical planet X. As a curious physicist, you set out to make the following measurements: (1) you observe that planet X has no appreciable atmosphere, (2) you measure that if you throw a 0.25 kg stone vertically upwards with launch speed 10 m/s, it comes back to ground in 8 sec, and (3) you measure the equatorial circumference to be 250,000 km. What is the mass of planet X? [Hint: The value of g on the planet surface is related to its mass M and radius R by the formula g = GM/R2.] a) 9*1025 kg b) 2.3*1027 kg c) 6.9*1026 kg If you take your spaceship to a 10,000 km altitude circular orbit around planet X, what would be the orbital period of the spaceship? [Hint: Use the fact that the gravitational force causes the radial acceleration to calculate the orbital speed.] a) 4.89 hrs b) 9.78 hrs c) 19.56 hrsarrow_forward
- Venus has an average distance to the sun of 0.723 AU. How do you calculate the orbital period of venus, and then calculate itarrow_forwardDuring a retrograde loop of Mars, would you expect Mars to be brighter than usual in the sky, about average in brightness, or fainter than usual in the sky? Explain.arrow_forwardWhich planets axis of rotation is a peculiarity, and why?arrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
- An Introduction to Physical SciencePhysicsISBN:9781305079137Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar TorresPublisher:Cengage LearningStars and Galaxies (MindTap Course List)PhysicsISBN:9781337399944Author:Michael A. SeedsPublisher:Cengage Learning
- Foundations of Astronomy (MindTap Course List)PhysicsISBN:9781337399920Author:Michael A. Seeds, Dana BackmanPublisher:Cengage LearningAstronomyPhysicsISBN:9781938168284Author:Andrew Fraknoi; David Morrison; Sidney C. WolffPublisher:OpenStax
An Introduction to Physical Science
Physics
ISBN:9781305079137
Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Publisher:Cengage Learning
Stars and Galaxies (MindTap Course List)
Physics
ISBN:9781337399944
Author:Michael A. Seeds
Publisher:Cengage Learning
Foundations of Astronomy (MindTap Course List)
Physics
ISBN:9781337399920
Author:Michael A. Seeds, Dana Backman
Publisher:Cengage Learning
Astronomy
Physics
ISBN:9781938168284
Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher:OpenStax
Kepler's Three Laws Explained; Author: PhysicsHigh;https://www.youtube.com/watch?v=kyR6EO_RMKE;License: Standard YouTube License, CC-BY