The Cosmic Perspective (9th Edition)
The Cosmic Perspective (9th Edition)
9th Edition
ISBN: 9780134874364
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 18, Problem 26EAP

Decide whether tile statement makes sense (or is clearly true) or does not make sense (or is clearly false). Explain clearly, not all of these have definitive answers, so your explanation is more important than your chosen answer

25. Gamman-ray bursts are more likely to be observed in galaxies that are rapidly forming new stars than in galaxies contain lug only old stars.

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Please answer fast 1. Lambda and Vacuum Energy Analze the relationship between Lambda (on one side of Einstein's equation) and vacuum energy (on the other side), including the implied equation of state and how it evolves with time.   2. Growth of Clustering Describe how clustering of mass and, therefore, galaxies grows. How could observations of galaxy clustering at different redshift be combined to constrain cosmological parameters?
Astronomy   Briefly explain what evidence we can use to learn about the lives of stars even though their lives are far longer than human lives.   Why do HR diagrams look different for star clusters of different ages? How do we use the diagram to determine the age of the cluster?   How can we estimate how much longer the lifetime of a low-mass star is than the lifetime of a high-mass star?   How do we use parallax to measure the distance to stars?   Explain the inverse square law for light. If we know the distance to a star, how do we find its luminosity? If we know the luminosity of a star, how do we find the distance?   What are apparent magnitude and absolute magnitude? How do they relate to apparent brightness and luminosity?   What is meant by spectral type? What spectral type is the hottest? Which is the coolest?   What is meant by luminosity class?   What are the three basic types of binary stars?
4. on the ONLY next page compare differences in and luminosity (more or Refer to the figure following questions. temperature (hotter or cooler) less luminous) as determined from the diagram. In other words, consider only what you know about relationships between temperature versus luminosity, diameter luminosity, or color versus temperature relationships. make NOT *IMPORTANT NOTE: DO stars' masses or stage of life answer. any versus reference to the for your as a reason a) WOLF 28 and PROCYON have roughly the same surface temperature. Which star is smaller in diameter? (Explain which property of the star supports your reasoning. Review directions above.) b) BETELGEUSE and SANDULEAK have about the same luminosity. Which star is larger in diameter? (Explain which property of the star supports your reasoning. Review directions above.) c) VEGA and ZZ CETI have about the same temperature. Which star is smaller in diameter? (Explain which property of the star supports your reasoning. Review…

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The Cosmic Perspective (9th Edition)

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