{"id":556,"date":"2022-03-02T16:33:24","date_gmt":"2022-03-02T16:33:24","guid":{"rendered":"https:\/\/pressbooks.ccconline.org\/astronomy\/?post_type=part&p=556"},"modified":"2022-03-02T16:33:24","modified_gmt":"2022-03-02T16:33:24","slug":"chapter-17-analyzing-starlight","status":"publish","type":"part","link":"https:\/\/pressbooks.ccconline.org\/astronomy\/part\/chapter-17-analyzing-starlight\/","title":{"raw":"Chapter 17 Analyzing Starlight","rendered":"Chapter 17 Analyzing Starlight"},"content":{"raw":"
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\r\n\r\n[caption id=\"\" align=\"aligncenter\" width=\"1312\"]\"Time Figure\u00a017.1<\/strong>\u00a0Star Colors.\u00a0This long time exposure shows the colors of the stars. The circular motion of the stars across the image is provided by Earth\u2019s rotation. The various colors of the stars are caused by their different temperatures. (credit: modification of work by ESO\/A.Santerne)[\/caption]<\/figure>\r\n<\/div>\r\n
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Chapter Outline<\/h3>\r\n
17.1<\/span>\u00a0The Brightness of Stars<\/span><\/div>\r\n
17.2<\/span>\u00a0Colors of Stars<\/span><\/div>\r\n
17.3<\/span>\u00a0The Spectra of Stars (and Brown Dwarfs)<\/span><\/div>\r\n
17.4<\/span>\u00a0Using Spectra to Measure Stellar Radius, Composition, and Motion<\/span><\/div>\r\n<\/div>\r\n
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Everything we know about stars\u2014how they are born, what they are made of, how far away they are, how long they live, and how they will die\u2014we learn by decoding the messages contained in the light and radiation that reaches Earth. What questions should we ask, and how do we find the answers?<\/p>\r\n

We can begin our voyage to the stars by looking at the night sky. It is obvious that stars do not all appear equally bright, nor are they all the same color. To understand the stars, we must first determine their basic properties, such as what their temperatures are, how much material they contain (their masses), and how much energy they produce. Since our Sun is a star, of course the same techniques, including spectroscopy, used to study the Sun can be used to find out what stars are like. As we learn more about the stars, we will use these characteristics to begin assembling clues to the main problems we are interested in solving: How do stars form? How long do they survive? What is their ultimate fate?<\/p>\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n

This book was adapted from the following: Fraknoi, A., Morrison, D., & Wolff, S. C. (2016). Thinking Ahead In Astronomy<\/i>. OpenStax. https:\/\/openstax.org\/books\/astronomy\/pages\/17-thinking-ahead under a Creative Commons Attribution License 4.0<\/a><\/div>\r\n
Access the entire book for free at\u00a0https:\/\/openstax.org\/books\/astronomy\/pages\/1-introduction<\/a><\/div>","rendered":"
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\"Time
Figure\u00a017.1<\/strong>\u00a0Star Colors.\u00a0This long time exposure shows the colors of the stars. The circular motion of the stars across the image is provided by Earth\u2019s rotation. The various colors of the stars are caused by their different temperatures. (credit: modification of work by ESO\/A.Santerne)<\/figcaption><\/figure>\n<\/figure>\n<\/div>\n
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Chapter Outline<\/h3>\n
17.1<\/span>\u00a0The Brightness of Stars<\/span><\/div>\n
17.2<\/span>\u00a0Colors of Stars<\/span><\/div>\n
17.3<\/span>\u00a0The Spectra of Stars (and Brown Dwarfs)<\/span><\/div>\n
17.4<\/span>\u00a0Using Spectra to Measure Stellar Radius, Composition, and Motion<\/span><\/div>\n<\/div>\n
\n

Everything we know about stars\u2014how they are born, what they are made of, how far away they are, how long they live, and how they will die\u2014we learn by decoding the messages contained in the light and radiation that reaches Earth. What questions should we ask, and how do we find the answers?<\/p>\n

We can begin our voyage to the stars by looking at the night sky. It is obvious that stars do not all appear equally bright, nor are they all the same color. To understand the stars, we must first determine their basic properties, such as what their temperatures are, how much material they contain (their masses), and how much energy they produce. Since our Sun is a star, of course the same techniques, including spectroscopy, used to study the Sun can be used to find out what stars are like. As we learn more about the stars, we will use these characteristics to begin assembling clues to the main problems we are interested in solving: How do stars form? How long do they survive? What is their ultimate fate?<\/p>\n<\/div>\n<\/div>\n<\/div>\n

This book was adapted from the following: Fraknoi, A., Morrison, D., & Wolff, S. C. (2016). Thinking Ahead In Astronomy<\/i>. OpenStax. https:\/\/openstax.org\/books\/astronomy\/pages\/17-thinking-ahead under a Creative Commons Attribution License 4.0<\/a><\/div>\n
Access the entire book for free at\u00a0https:\/\/openstax.org\/books\/astronomy\/pages\/1-introduction<\/a><\/div>\n","protected":false},"parent":0,"menu_order":17,"template":"","meta":{"pb_part_invisible":false,"pb_part_invisible_string":""},"contributor":[],"license":[],"class_list":["post-556","part","type-part","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/parts\/556","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/parts"}],"about":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/types\/part"}],"version-history":[{"count":1,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/parts\/556\/revisions"}],"predecessor-version":[{"id":557,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/pressbooks\/v2\/parts\/556\/revisions\/557"}],"wp:attachment":[{"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/media?parent=556"}],"wp:term":[{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/contributor?post=556"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.ccconline.org\/astronomy\/wp-json\/wp\/v2\/license?post=556"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}