Horizons: Exploring the Universe (MindTap Course List)
14th Edition
ISBN: 9781305960961
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Question
Chapter 1, Problem 4LTL
To determine
To tell about the stars which are brightest and which are faintest and their sizes from the given photograph.
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Check out a sample textbook solutionStudents have asked these similar questions
Problem 5. Imagine that you observe a star field twice, with a six-month gap between
your observations, and that you see the two sets of stars shown below. Which do you think
is closest to the observer?
Figure 1: Schematic of image of stars A,B, and P taken six months apart.
Problem 6. Suppose the angular separation between stars A and B is 0.5 arcseconds. How
far would you estimate star P to lie from the observer?
A distant galaxy has an apparent magnitude of 13 and is 5,000 kpc away. What is its absolute magnitude? (Round your answer to at least one decimal place.)
The difference in absolute magnitude between two objects viewed from the same distance is related to their fluxes by the flux-magnitude relation.
FA
= 2.51(MB - MA)
FB
How does the absolute magnitude of this galaxy compare to the Milky Way (M = -21)?
F,
distant galaxy
FMilky Way
Use this interactive simulation of stellar parallax. Change the distance to the star to values given in column 2. Write down the parallax angle in arcsec for each distance. Convert the parallax angle to
radians. Calculate the distance. If your calculation is correct, your number in the last column should be similar to the number in column 2 (NOT THE SAME!).
1 AU is 4.85 x 10-6 pc
(Don't write units with your answer!)
Measured (true)
Parallax angle n
(in radians) (use 2 significant D (round your answer to 2
figures)
Calculated distance
Object
Parallax angle
(in arcsec)
Distance from
Position
"Sun" in pc
decimal places)
Nearest
0.5
Intermediate
1
Farthest
1.5
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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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
- Look at Figure 1-9. Would you say that the distribution of stars is uniform in this field of view, 17 ly across? Compare with Figure 1-10, 1700 ly across. Now look at Figure 1-12; would you say that the distribution of galaxies is uniform in this field of view, 17 million ly across? Compare with Figure 1-13, 1.7 billion ly across.arrow_forwardThe stars in a CCD image include stars in a cluster and stars in front of the cluster (i.e. starts that don't belong to it). One group has parallaxes clustered around of 3 milli-seconds of arc (or "3 mas"). The parallaxes of the other group range from 10 mas to 15 mas. Which group contains the stars in the cluster? Explain your answer.arrow_forward3 4 Suppose that someone in the Andromeda galaxy had a super-telescope through which they were looking at Earth right now. They would see Earth A B C D B As it was about 2 ½ million years ago C As it was about 100,000 years ago Which of the following statements about stellar parallax is true? As it will be about 2 ½ million years from now A We observe all stars to exhibit at least a slight amount of parallax. E As it is right now Stellar parallax was first observed by ancient Greek astronomers. The amount of parallax we see depends on how fast a star is moving relative to us. D It takes at least 10 years of observation to measure a star's parallax. The closer a star is to us, the more parallax it exhibits.arrow_forward
- Listed below are several fictional stars with their luminosities and distances from Earth given. Rank the stars based on how bright each would appear in the sky as seen from Earth, from brightest to dimmest. A) Q-bert: L=400Lsun, d=40lyB) Frogger: L=400Lsun, d=20lyC) Centipede: L=200Lsun, d=10lyD) Galaga: L=100Lsun, d=8lyE) Pacman: L=200Lsun, d=20lyarrow_forwardOn Earth, the parallax angle measured for the star Procyon is 0.29 arcseconds. If you were to measure Procyon's parallax angle from Venus, what would the parallax angle be? (Note: Earth's orbital radius is larger than Venus's orbital radius.) A. more than 0.29 arcseconds O B. 0.29 arcseconds O C. less than 0.29 arcseconds D. zero arcseconds (no parallax)arrow_forward1. A distant galaxy has an apparent magnitude of 10 and is 4,000 kpc away. What is its absolute magnitude? (Round your answer to at least one decimal place.) The difference in absolute magnitude between two objects viewed from the same distance is related to their fluxes by the flux-magnitude relation. FA/FB= 2.51(MB − MA) 2. How does the absolute magnitude of this galaxy compare to the Milky Way (M = −21)?arrow_forward
- Consider two stars A and B, with apparent magnitudes mA = 3 and mB = 13. Which star is brighter? (Answer this for yourself---don't enter below. This is easy if you understand the meaning of the magnitude scale.) How much brighter (in flux) is the brighter star? (I.e., enter the appropriate multiplicative factor N, such that Fbrighter = N Fdimmer. )arrow_forwardReview Conceptual Example 3 for information pertinent to this problem. When we look at a particular star, we are seeing it as it was 307 years ago. How far away from us (in meters) is the star? Take a year to be 365.25 days.arrow_forwardhow is the rotation curve method related to binary stars and Kepler’s third law?arrow_forward
- The H-R diagram is the most important graph in astronomy. One of the reasons that this graph is so powerful is the number of different kinds of data it shows. Most graphs show two types of data. The H-R diagram shows seven. Can you name these 7 types of information about stars that appear on the H-R diagram?arrow_forwardOn Earth, the parallax angle measured for the star Procyon is 0.29 arcseconds. If you were to measure Procyon's parallax angle from Venus, what would the parallax angle be? (Note: Earth's orbital radius is larger than Venus's orbital radius.) A. more than 0.29 arcseconds B. 0.29 arcseconds C. less than 0.29 arcseconds D.zero arcseconds (no parallax)arrow_forward1:Which star has been redshifted the most? 2:Which star is moving towards us the fastest? Star C Star D Star A Star B 3:The wavelength of this spectral feature is measured to be 600nm in the lab, and 609 in Star A. What is the radial velocity of Star A? using km/s,arrow_forward
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