Modified Mastering Astronomy With Pearson Etext -- Standalone Access Card -- For The Cosmic Perspective Fundamentals (2nd Edition)
2nd Edition
ISBN: 9780133994124
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 1, Problem 4QQ
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Whether or not, we will come to know about a star Antares if it explodes today.
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Billions of years from now, our Sun will eventually end its life as a
Suppose we find an Earth-like planet around one of our nearest stellar neighbors, Alpha Centauri (located only 4.4 light-years away). If we launched a "generation ship" at a constant speed of 1500.00 km/s from Earth with a group of people whose descendants will explore and colonize this planet, how many years before the generation ship reached Alpha Centauri? (Note there are 9.46 ××1012 km in a light-year and 31.6 million seconds in a year.
The average distance between earth and its moon is 384,400 kilometers. At their closest point (when both planets are lined up on the same side of the sun), the distance between earth and Jupiter is 588,000,000 kilometers. Using these two distances, and the fact that 1 kilometer = 0.62 miles, how much further away from earth (in miles) is Jupiter than our moon?
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Modified Mastering Astronomy With Pearson Etext -- Standalone Access Card -- For The Cosmic Perspective Fundamentals (2nd Edition)
Ch. 1 - Choose the best answer to each of the following....Ch. 1 - Choose the best answer to each of the following....Ch. 1 - Choose the best answer to each of the following....Ch. 1 - Prob. 4QQCh. 1 - Could we see a galaxy that is 20 billion...Ch. 1 - Choose the best answer to each of the following....Ch. 1 - Choose the best answer to each of the following....Ch. 1 - When we say the universe is expanding, we mean...Ch. 1 - Choose the best answer to each of the following....Ch. 1 - Choose the best answer to each of the following....
Ch. 1 - Choose the best answer to each of the following....Ch. 1 - Choose the best answer to each of the following....Ch. 1 - Explain all answers clearly, using complete...Ch. 1 - Alien Technology, Some people believe that Earth...Ch. 1 - Explain all answers clearly, using complete...Ch. 1 - Explain all answers clearly, using complete...Ch. 1 - Explain all answers clearly, using complete...Ch. 1 - Prob. 18SEQCh. 1 - Explain all answers clearly, using complete...Ch. 1 - Explain all answers clearly, using complete...Ch. 1 - Explain all answers clearly, using complete...Ch. 1 - Explain all answers clearly, using complete...
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- The Sun was once thought to be a planet. Explain why.arrow_forwardDo the previous problem again, this time using the information that the Sun is 150,000,000 km away. You will get a very large number of km as your answer. To get a better feeling for how the distances compare, try calculating the time it takes light at a speed of 299,338 km/s to travel from the Sun to Earth and from Alpha Centauri to Earth. For Alpha Centauri, figure out how long the trip will take in years as well as in seconds.arrow_forwardIf the solar nebula hypothesis is correct, do you think there are more planets in the Universe than stars? Why or why not?arrow_forward
- Earth 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/m^2. 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. b) At the orbit of Jupiter (780 million km from the Sun).arrow_forwardIt took astronauts 3 days to reach the moon, which is 384,400km from Earth. Going at the same speed, how much longerwould it take astronauts to reach Mars, which is 0.524 AU fromEarth.arrow_forward
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