Study Guides
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1.
Brightness and Distance Help
Brightness and Distance Have you ever heard that stars are “distant suns”? This is true, but it does not tell the whole story. There are plenty of stars that resemble our Sun, but many are larger or smaller, brighter or dimmer, or hotter or cooler. ...
Source: McGraw-Hill Professional -
2.
Spectral Classifications Help
Spectral Classifications On a clear night, especially when the Moon is not above the horizon and there are not many lights to produce skyglow, it’s easy to see that stars have different colors, as well as different levels of brilliance. This is so because of ...
Source: McGraw-Hill Professional -
3.
Stellar Birth and Life Help
Introduction to Stellar Birth and Life All stars evolve from clouds of gas and dust. If the original material in the Universe were perfectly homogeneous—equally dense at every point in space—stars could, in theory, never form. The slightest ...
Source: McGraw-Hill Professional -
4.
Variable Stars Help
Introduction to Variable Stars—Eclipsing Binaries Some stars, like our Sun, maintain constant brightness from hour to hour, day to day, and year to year. However, there are many pulsating, or variable, stars in ...
Source: McGraw-Hill Professional -
5.
Stellar Anatomy and Longevity Help
Stellar Anatomy—Model Stars It is safe to say that no human being will ever travel inside a star to find out what the interior is like. Conditions inside stars are too hostile for any kind of direct observation or ...
Source: McGraw-Hill Professional -
6.
Star Clusters and Nebulae Help
Star Clusters—Open Clusters Some star systems contain hundreds, thousands, or even millions of individual stars, all held in each other’s vicinity by their mutual gravitation. Some huge gas-and-dust clouds condense into star ...
Source: McGraw-Hill Professional -
7.
Stars and Nebulae Practice Problems
Review the following concepts if needed: Brightness and Distance Help
Source: McGraw-Hill Professional -
8.
Our Cosmic Home Practice Questions
Review these concepts at: Our Cosmic Home Study Guide Practice Problems 1. How many years ago was the Big Bang? a. 13.7 trillion years ago
Source: LearningExpress, LLC
