Horizons: Exploring the Universe (MindTap Course List)
14th Edition
ISBN: 9781305960961
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Textbook Question
Chapter 1, Problem 1LTL
In Figure 1-4, the division between daylight and darkness is at the right on the globe of Earth. How do you know this is the sunset line and not the sunrise line?
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Given the location of Springfield, IL is 40N and 90W, answer the following questions. You
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When Springfield’s day light time is about 9 hours, what is the Sun-angle in Springfield? Use your calculation to explain your answer
The two figures provided below show the motion of Stars A and B in the sky. Note that Star A is first visible above the horizon at noon.
In what direction is Star B moving at 3:00 am?
Celestial Sphere
Rotation
Path of
Celestial
Star B 1
Sphere
Path of
North Star
North Star
Star A
9 PM
3.
North
Earth's'
Horizon
Equator
Celestial
Sphere
Rotation
O A. west (to the left)
B. east (to the right)
O C. south (out of the page)
OD. away from the horizon (up)
E. toward the horizon (down)
The angle between two lines drawn from a point on Earth to two opposite sides of the Moon make an angle of 0.5 degrees.
If you do the same thing for the two opposite ends of Andromeda (as shown above), you find an angle of 5 degrees.
Let's assume Andromeda and the Moon are equally far away from our location on Earth (of course that's wrong, but how are we supposed to know?) -
then how much larger would the diameter of Andromeda be (as indicated by the arrows at the top), compared to the diameter of the Moon?
Pick the answer that's closest to what you get under this hypothetical assumption:
A. Equal Diameter
B. Twice
C. Five times
D. Ten times
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
- Suppose you are on a strange planet and observe, at night, that the stars do not rise and set, but circle parallel to the horizon. Next, you walk in a constant direction for 8000 miles, and at your new location on the planet, you find that all stars rise straight up in the east and set straight down in the west, perpendicular to the horizon. How could you determine the circumference of the planet without any further observations? What is the circumference, in miles, of the planet?arrow_forwardLook at Figure 2-9, shown here. If you see Sagittarius high in your night sky on June 20 and today is your birthday, what is your zodiac constellation?arrow_forwardUrsa Minor contains the pole star, Polaris, and the asterism known as the Little Dipper. From most locations in the Northern Hemisphere, all of the stars in Ursa Minor are circumpolar. Does that mean these stars are also above the horizon during the day? Explain.arrow_forward
- Which has the larger angular diameter in the skythe Sun or Moonduring an annular eclipse? If you wanted to be in the umbra, where would you have to physically be located to see this annular eclipse as a total solar eclipse?arrow_forwardApproximately 9000 stars are visible to the naked eye in the whole sky (imagine that you could see around the entire globe and both the northern and southern hemispheres), and there are about 41,200 square degrees on the sky. How many stars are visible per square degree? Per square arcsecond?arrow_forwardIf you go out to look at the night sky tonight from central Iowa, the North Star (aka Polaris) is located near the North Celestial Pole at an altitude of approximately 42 degrees above the horizon. Why is that the case? What is the altitude of the celestial equator at its highest point as viewed from this location and how do we calculate that? Explain the myth behind one of the constellations located near North Celestial Pole and then explain the myth behind another constellation along the ecliptic plane.arrow_forward
- As we discuss in class, the radius of the Earth is approximately 6370 km. Theradius of the Sun, on the other hand, is approximately 700,000 km. The Sun is located,on average, one astronomical unit (1 au) from the Earth. Imagine that you stand near Mansueto Library, at the corner of 57th and Ellis.Mansueto’s dome is 35 feet (10.7 meters) high. Let’s imagine we put a model of theSun inside the dome, such that it just fits — that is, the model Sun’s diameter is 35 feet The nearest star to the Solar System outside of the Sun is Proxima Centauri,which is approximately 4.2 light years away. Given the scale model outlined above,how far would a model Proxima Centauri be placed from you? Give your answer inmiles and kmarrow_forward1. Where would the north celestial pole be located in the sky if you stood at the North Pole? A. 32.5 degrees above the northern horizon B. directly at your northern horizon C. 23.5 degrees above the northern horizon D. 57.5 degrees above the northern horizon E. directly over your head at your zenith 2. Where would the north celestial pole be located in the sky if you were standing in San Diego (San Diego’s latitude is 32.5 degrees above the equator? A. 32.5 degrees above the northern horizon B. directly at your northern horizon C. 57.5 degrees above the northern horizon D. directly over your head at your zenith E. 23.5 degrees above the northern horizonarrow_forwardwhich of the following is an accurate description of how the sun drifts annually relative to the celestial sphere? Choose one of the following: a. the sun appears to shift only north or south, with no apparent drift east or west b. each day, the sun appears to drift primarily from east to west c. each day, the sun appears to drift primarily from west to east d. the sun does not appear to drift at all relative to the background stars, as defined by our 24 hour dayarrow_forward
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