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Preface  (Page 2/4)

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Coverage and scope

Astronomy was written, updated, and reviewed by a broad range of astronomers and astronomy educators in a strong community effort. It is designed to meet scope and sequence requirements of introductory astronomy courses nationwide.

  • Chapter 1: Science and the Universe: A Brief Tour
  • Chapter 2: Observing the Sky: The Birth of Astronomy
  • Chapter 3: Orbits and Gravity
  • Chapter 4: Earth, Moon, and Sky
  • Chapter 5: Radiation and Spectra
  • Chapter 6: Astronomical Instruments
  • Chapter 7: Other Worlds: An Introduction to the Solar System
  • Chapter 8: Earth as a Planet
  • Chapter 9: Cratered Worlds
  • Chapter 10: Earthlike Planets: Venus and Mars
  • Chapter 11: The Giant Planets
  • Chapter 12: Rings, Moons, and Pluto
  • Chapter 13: Comets and Asteroids: Debris of the Solar System
  • Chapter 14: Cosmic Samples and the Origin of the Solar System
  • Chapter 15: The Sun: A Garden-Variety Star
  • Chapter 16: The Sun: A Nuclear Powerhouse
  • Chapter 17: Analyzing Starlight
  • Chapter 18: The Stars: A Celestial Census
  • Chapter 19: Celestial Distances
  • Chapter 20: Between the Stars: Gas and Dust in Space
  • Chapter 21: The Birth of Stars and the Discovery of Planets outside the Solar System
  • Chapter 22: Stars from Adolescence to Old Age
  • Chapter 23: The Death of Stars
  • Chapter 24: Black Holes and Curved Spacetime
  • Chapter 25: The Milky Way Galaxy
  • Chapter 26: Galaxies
  • Chapter 27: Active Galaxies, Quasars, and Supermassive Black Holes
  • Chapter 28: The Evolution and Distribution of Galaxies
  • Chapter 29: The Big Bang
  • Chapter 30: Life in the Universe
  • Appendix A: How to Study for Your Introductory Astronomy Course
  • Appendix B: Astronomy Websites, Pictures, and Apps
  • Appendix C: Scientific Notation
  • Appendix D: Units Used in Science
  • Appendix E: Some Useful Constants for Astronomy
  • Appendix F: Physical and Orbital Data for the Planets
  • Appendix G: Selected Moons of the Planets
  • Appendix H: Upcoming Total Eclipses
  • Appendix I: The Nearest Stars, Brown Dwarfs, and White Dwarfs
  • Appendix J: The Brightest Twenty Stars
  • Appendix K: The Chemical Elements
  • Appendix L: The Constellations
  • Appendix M: Star Charts and Sky Event Resources

Currency and accuracy

Astronomy has information and images from the New Horizons exploration of Pluto, the discovery of gravitational waves, the Rosetta Mission to Comet C-G, and many other recent projects in astronomy. The discussion of exoplanets has been updated with recent information—indicating not just individual examples, but trends in what sorts of planets seem to be most common. Black holes receive their own chapter, and the role of supermassive black holes in active galaxies and galaxy evolution is clearly explained. Chapters have been reviewed by subject-matter experts for accuracy and currency.

Flexibility

Because there are many different ways to teach introductory astronomy, we have made the text as flexible as we could. Math examples are shown in separate sections throughout, so that you can leave out the math or require it as you deem best. Each section of a chapter treats a different aspect of the topic being covered; a number of sections could be omitted in shorter overview courses and can be included where you need more depth. And, as we have already discussed, you can customize the book in a variety of ways that have never been possible in traditional textbooks.

Questions & Answers

Examine the distinction between theory of comparative cost Advantage and theory of factor proportion
Fatima Reply
What is inflation
Bright Reply
a general and ongoing rise in the level of prices in an economy
AI-Robot
What are the factors that affect demand for a commodity
Florence Reply
price
Kenu
differentiate between demand and supply giving examples
Lambiv Reply
differentiated between demand and supply using examples
Lambiv
what is labour ?
Lambiv
how will I do?
Venny Reply
how is the graph works?I don't fully understand
Rezat Reply
information
Eliyee
devaluation
Eliyee
t
WARKISA
hi guys good evening to all
Lambiv
multiple choice question
Aster Reply
appreciation
Eliyee
explain perfect market
Lindiwe Reply
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
Ezea
What is ceteris paribus?
Shukri Reply
other things being equal
AI-Robot
When MP₁ becomes negative, TP start to decline. Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Kelo
yes,thank you
Shukri
Can I ask you other question?
Shukri
what is monopoly mean?
Habtamu Reply
What is different between quantity demand and demand?
Shukri Reply
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
Ezea
ok
Shukri
how do you save a country economic situation when it's falling apart
Lilia Reply
what is the difference between economic growth and development
Fiker Reply
Economic growth as an increase in the production and consumption of goods and services within an economy.but Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
Shukri
production function means
Jabir
What do you think is more important to focus on when considering inequality ?
Abdisa Reply
any question about economics?
Awais Reply
sir...I just want to ask one question... Define the term contract curve? if you are free please help me to find this answer 🙏
Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
Awais
thank you so much 👍 sir
Asui
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
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Source:  OpenStax, Astronomy. OpenStax CNX. Apr 12, 2017 Download for free at http://cnx.org/content/col11992/1.13
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