Horizons: Exploring the Universe (MindTap Course List)
14th Edition
ISBN: 9781305960961
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 1, Problem 5RQ
To determine
To describe about the size of start image in a photograph.
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Consider two identical stars, A and B. Star B is 10 times farther away than star A. What is the difference
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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?
Chapter 1 Solutions
Horizons: Exploring the Universe (MindTap Course List)
Ch. 1 - What is the largest dimension of which you have...Ch. 1 - What is the difference between our Solar System,...Ch. 1 - Why are light-years more convenient than miles,...Ch. 1 - Why is it difficult to detect planets orbiting...Ch. 1 - Prob. 5RQCh. 1 - What is the difference between the Milky Way and...Ch. 1 - What are the largest known structures in the...Ch. 1 - Prob. 8RQCh. 1 - How Do We Know? How does the scientific method...Ch. 1 - You and three of your friends have won an...
Ch. 1 - Think back to the last time you got a new phone...Ch. 1 - The diameter of Earth across the equator is 7928...Ch. 1 - The diameter of the Moon across its equator is...Ch. 1 - One astronomical unit is about 1.50108 km. Explain...Ch. 1 - Venus orbits 0.72 AU from the Sun. What is that...Ch. 1 - Light from the Sun takes 8 minutes to reach Earth....Ch. 1 - The Sun is almost 400 times farther from Earth...Ch. 1 - If the speed of light is 3.00105 km/s. how many...Ch. 1 - How long does it take light to cross the diameter...Ch. 1 - The nearest large galaxy to our n is about 2.5...Ch. 1 - How many galaxies like our own would it take Laid...Ch. 1 - In Figure 1-4, the division between daylight and...Ch. 1 - Prob. 2LTLCh. 1 - Prob. 3LTLCh. 1 - Prob. 4LTL
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- If two stars differ by 8 magnitudes, what is their flux ratio?arrow_forwardWhat does the word apparent mean in apparent visual magnitude?arrow_forwardStar A and Star B have different apparent brightnesses but identical luminosities. If Star A is 20 light-years away from Earth and Star B is 40 light-years away from Earth, which star appears brighter and by what factor?arrow_forward
- Based on their colors, which of the following stars is hottest? Which is coolest? Archenar (blue), Betelgeuse (red), Capella (yellow).arrow_forwardHertzsprung-Russell Diagram Blue or blue white White Vellow Red orange Red ORian Superglants Beleigrre Main Sequence Alderaron Glants Alpho Cetaut. E Sirius White 5,000 3,000 10,000 Surface Temperature ("C) 50.000 20.000 6,000 What is the color of the stars shown on the diagram that have the lowest surface temperature? O red O yellow O blue O white Brightness Increasingarrow_forward15: 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.arrow_forward
- What is the difference in magnitude for two stars is one appears four times brighter than the other?arrow_forwardConsider two identical stars, A and B. Star B is 10 times farther away than star A. What is the differencein magnitudes between the two stars?arrow_forwardA first-magnitude star is 100 times brighter than a sixth-magnitude star, which means each difference in magnitude represents a brightness change of 2.51 times. Compare the brightness of a star with an apparent magnitude (m) of −2.1 to a star with an apparent magnitude of +2.9.A first-magnitude star is 100 times brighter than a sixth-magnitude star, which means each difference in magnitude represents a brightness change of 2.51 times. Bchange ≈arrow_forward
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