Stars and Galaxies (MindTap Course List)
10th Edition
ISBN: 9781337399944
Author: Michael A. Seeds
Publisher: Cengage Learning
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Chapter 1, Problem 3SP
To determine
The celestial body whose radius is approximately equal to 100 times Sun’s diameter.
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Students have asked these similar questions
An astronomical unit (AU) is defined as the average distance between
the solar system and Alpha Centauri
the Earth and the Moon
the Milky Way Galaxy and the Andromeda Galaxy
the Earth and the Sun
It is important to have an idea about the distances between and relative sizes of celestial objects in the
solar system. In Part 1 we will pretend to shrink the solar system until its center piece, the Sun, is 67.3 cm
in diameter. This will represent the Sun which is 1,390,000 km in diameter. The scale of our model is thus:
67.3 cm
= 4.84 x 10-5 cm
km
Scale
1, 390, 000 km
To find the size or distance between objects in centimeters for the model, simply multiply the actual size
or distance in kilometers by the scale factor above.
1. Fill in following table:
Quantity
Actual Distance (km) Model Distance (cm)
Diameter of Sun
1,390,000
Diameter of Earth
12,760
Diameter of Moon
3,480
Distance Between Earth and Sun
1.5 x 108
Distance Between Earth and Moon
384,000
Distance to Proxima Centauri
3.97 x 1013
Raising a number in scientific notation to a power is easy:
(5 x 105)² = (5)² x (105)² = 5 x 5 x 105 x 105 = 25 x 10(5 × 2) = 25 x 1010 = 2.5 x 101¹1
Keeping this in mind, what is the volume of the sun in km³? The radius of the sun is about 7 x 105 km, and the volume of a sphere is 4/3 x Pi x R³. (Use 3.14 for Pi, and enter your answer with two decimal places).
km³
3
What is the average density of the Sun? Density = mass / volume. The mass of the sun is 2.0x10³0 kg.
kg/km³
Chapter 1 Solutions
Stars and Galaxies (MindTap Course List)
Ch. 1 - Prob. 1RQCh. 1 - Prob. 2RQCh. 1 - Prob. 3RQCh. 1 - What is the difference between the Moon and a...Ch. 1 - Prob. 5RQCh. 1 - Why are light-years more convenient than miles,...Ch. 1 - Prob. 7RQCh. 1 - Prob. 8RQCh. 1 - Prob. 9RQCh. 1 - Prob. 10RQ
Ch. 1 - What are the largest known structures in the...Ch. 1 - Prob. 12RQCh. 1 - Prob. 13RQCh. 1 - Prob. 14RQCh. 1 - Prob. 15RQCh. 1 - Prob. 16RQCh. 1 - Prob. 1PCh. 1 - The equatorial diameter of the Moon is 3476...Ch. 1 - Prob. 3PCh. 1 - A typical galaxy is shown on the first page of the...Ch. 1 - Prob. 5PCh. 1 - Prob. 6PCh. 1 - Prob. 7PCh. 1 - Prob. 8PCh. 1 - If the speed of light is 3.0 105 km/s, how many...Ch. 1 - Prob. 10PCh. 1 - How long does it take light to cross the diameter...Ch. 1 - Prob. 12PCh. 1 - Prob. 13PCh. 1 - Prob. 1SPCh. 1 - Prob. 2SPCh. 1 - Prob. 3SPCh. 1 - Prob. 4SPCh. 1 - Prob. 1LLCh. 1 - Prob. 2LLCh. 1 - Prob. 3LLCh. 1 - Prob. 4LLCh. 1 - Prob. 5LLCh. 1 - Prob. 6LL
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- The distance from the Sun to the nearest star is about 4 1016 m. The Milky Way galaxy (Fig. P1.31) is roughly a disk of diameter 1021 in and thickness 1019 m. Find the order of magnitude of the number of stars in the Milky Way. Assume the distance between the Sun and our nearest neighbor is typical. Figure P1.31 The Milky Way galaxy.arrow_forwardArrange the following in order of increasing size: Earth; the Sun; Earths orbit around the Sun; the Moon; you; the Milky Way Galaxy; the Moons orbit around Eartharrow_forwardThe light a planet receives from the Sun (per square meter of planet surface) decreases with the square of the distance from the Sun. So a planet that is twice as far from the Sun as Earth receives (1/2)2=0.25 times (25%) as much light and a planet that is three times as far from the Sun receives (1/3)2=0.11 times (11%) as much light. How much light is received by the moons of Jupiter and Saturn (compared to Earth), worlds which orbit 5.2 and 9.5 times farther from the Sun than Earth?arrow_forward
- How Do We Know? How can a scientific model be useful if it is not a true description of nature?arrow_forwardThe nearest star to our sun is Proxima Centauri, at a distance of 4.3 light-years from the Sun. A light-year is the distance that light travels in one year (365 days). How far away, in kilometers, is Proxima Centauri from the Sun?Express your answer using two significant figures.arrow_forwardThe distance light travels in one second(one light-second) is about 1.86×10⁵ mi. Saturn is about 475 light-seconds from the sun. About how many miles from the sun is Saturn?arrow_forward
- Which of these correctly compares the masses of different objects in the universe? O A moon has less mass than a star and more mass than the planet it orbits O A planet has less mass than a galaxy and more mass than a star it orbits O A galaxy has less mass than a moon and more mass than a planet O A star has less mass than a galaxy and more mass than a planetarrow_forwardWhat would the angle between the Sun and the Earth be if the solar system were viewed from a distance of 1 pc?arrow_forwardWhich unit of length would most likely be used to measure the distance from Earth to stars other than the sun? O Meter O Light-year O Kilometer O Astronomical unit 24 25 26 27 28arrow_forward
- Please answer with stepsarrow_forwardDescribes the aurora, Describes the approximate size of Aurora, Describes the approximate distance from Earth of the aurora. Describes the crescent moon, Describes the approximate size of the crescent moon, Describes the approximate distance from Earth of the moon. Describes the planet venus, Describes the approximate size of venus, Describes the approximate distance from Earth of the venus. Describes the milkyway, Describes the approximate size of milkyway, Describes the approximate distance from Earth of the milkyway. Describes the comet hyakutake, Describes the approximate size of comet hyakutake, Describes the approximate distance from Earth of the comet hyakutake. Describes the asterism the big dipper , Describes the approximate size ofasterism the big dipper , Describes the approximate distance from Earth of the asterism the big dipper. Describes the constellation, Describes the approximate size ofconstellation, Describes the approximate distance from Earth of the constellation.…arrow_forwardEarth is about 150 million kilometers from the Sun (1 Astronomical Unit, or AU), and the apparent brightness of the Sun in our sky is about 1300 watts/m2. Using these two facts and the inverse square law for light, determine the apparent brightness that we would measure for the Sun if we were located at the following positions. a) At the orbit of Jupiter (780 million km from the Sun).arrow_forward
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