Lecture- Tutorials for Introductory Astronomy
3rd Edition
ISBN: 9780321820464
Author: Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher: Addison-Wesley
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Textbook Question
Chapter 2, Problem 3SPEP
Star B has an apparent magnitude of 0, which tells us how bright it appears from Earth at its true location. Star B has an absolute magnitude of 2, which tells us how bright it would appear if it were at a distance of 10 parsecs (about 33 light-years).
Where would Star B appear brighter, in its true location or if it were at a distance of 10 parsecs? Explain your reasoning.
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Students have asked these similar questions
15: A star has a parallax angle of 0.0270 arcseconds and an apparent magnitude of 4.641. What is the distance to this star? Answer: 37
16: What is the absolute magnitude of this star? Answer:1.8
17: Is this star more or less luminous than the Sun? Answer "M" for More luminous or "L" for Less luminous. (HINT: the absolute magnitude of the Sun is 4.8) Answer: M
18: What is the luminosity of this star? (HINT: The luminosity of the Sun is 3.85×1026 W.)
Please answer question #18, #15-17 are correct, the photos provide the work for them.
Star A has an apparent magnitude of –1.5 and is 12.6 light-years from Earth. Star B has an apparent magnitude of 0.4 and is 15.6 light-years from Earth.
Why should apparent magnitude NOT be used to determine which star is brighter? What information could help you determine which star is brighter?
Use a diagram to explain what is meant by the parallax angle, p, for a star observed twice from Earth, with a 6-month interval between each observation. Hence define the parsec, and calculate its value in astronomical units and metres. The star Betelgeuse is observed to have a parallax angle p = 4.5 × 10−3 arcseconds. State the distance of Betelgeuse in units of parsecs and light years.
Chapter 2 Solutions
Lecture- Tutorials for Introductory Astronomy
Ch. 2 - Does this planet obey Kepler's second law? How do...Ch. 2 - If you were carefully watching this planet during...Ch. 2 - Draw two lines: one connecting the planet at...Ch. 2 - Pick any two planet positions (C, D, E, F, G, H,...Ch. 2 - How would the time it takes the planet to travel...Ch. 2 - During which of the two time intervals for which...Ch. 2 - During which of the two time intervals for which...Ch. 2 - Does the planet appear to be traveling the same...Ch. 2 - At which position would the planet have been...Ch. 2 - At Position D, is the speed of the planet...
Ch. 2 - Provide a concise statement that describes the...Ch. 2 - Which of the three orbits shown below (A, B, or C)...Ch. 2 - Which of the listed objects would experience the...Ch. 2 - Describe the extent to which you think Earth's...Ch. 2 - Which of the two planets (Esus or Sulis) do you...Ch. 2 - If Esus and Sulis were to switch positions, would...Ch. 2 - Do you think the orbital period for Esus would...Ch. 2 - Imagine both Esus and Sulis were in orbit around...Ch. 2 - According to the graph, would you say that the...Ch. 2 - How far from the central star does a planet orbit...Ch. 2 - How long does it take a planet to complete one...Ch. 2 - Based on your results from Questions 6 and 7,...Ch. 2 - What is the name of the planet that you identified...Ch. 2 - Using the information provided in the table above...Ch. 2 - A student in your class makes the following...Ch. 2 - Review your answers to Questions 1-4. Do you still...Ch. 2 - Given that Earth is much larger and more massive...Ch. 2 - Prob. 2NEPCh. 2 - How would the strength of the force between the...Ch. 2 - On the diagram, clearly label the location where...Ch. 2 - On the diagram, clearly label the location where...Ch. 2 - Where would the spaceprobe experience the...Ch. 2 - When the spacecraft is at the halfway point, how...Ch. 2 - Two students are discussing their answer to the...Ch. 2 - If the spaceprobe had lost all ability to control...Ch. 2 - Imagine that you need to completely stop the...Ch. 2 - Your weight on Earth is simply the gravitational...Ch. 2 - Which value, apparent magnitude, or absolute...Ch. 2 - Prob. 2APPCh. 2 - Prob. 3APPCh. 2 - Prob. 4APPCh. 2 - The star Lee has an apparent magnitude of 0.1 and...Ch. 2 - Prob. 6APPCh. 2 - Prob. 7APPCh. 2 - Imagine that you are looking at the stars from...Ch. 2 - Repeat Question 1 for July and label the distant...Ch. 2 - In the box below, the same distant stars are shown...Ch. 2 - In the same box, draw another × to indicate the...Ch. 2 - Prob. 5THPCh. 2 - Prob. 6THPCh. 2 - Starting from Earth in January, draw a line...Ch. 2 - Prob. 8THPCh. 2 - Prob. 9THPCh. 2 - Is a parsec a unit of length or a unit of angle?...Ch. 2 - Prob. 11THPCh. 2 - Prob. 12THPCh. 2 - Prob. 13THPCh. 2 - Check your answers to Questions 6 and 11 and...Ch. 2 - What is the angle between you, the house, and the...Ch. 2 - You see the Moon on the horizon just above the...Ch. 2 - Compare your answers for the barn-house angle from...Ch. 2 - Do the angles from above tell you anything about...Ch. 2 - Prob. 5PAPCh. 2 - Prob. 6PAPCh. 2 - Prob. 7PAPCh. 2 - Prob. 8PAPCh. 2 - Prob. 9PAPCh. 2 - Prob. 10PAPCh. 2 - Prob. 11PAPCh. 2 - Prob. 12PAPCh. 2 - Prob. 13PAPCh. 2 - Which object will look brighter from Earth, the...Ch. 2 - Prob. 2SPEPCh. 2 - Star B has an apparent magnitude of 0, which tells...Ch. 2 - Prob. 4SPEPCh. 2 - Prob. 5SPEPCh. 2 - Prob. 6SPEPCh. 2 - Prob. 7SPEP
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