Understanding our universe/ 
Stacy Palen; Laura Kay; Brad Smith; George Blumenthal. 
 - Second edition. 
 - New York :   W.W. Norton & Company, Inc.,   2015. 
 - xxix, 485 p.:  color illustrations;   27 cm. 
<br/><br/> includes index 
<br/><br/><label>ISBN: </label>9780393936315 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Astronomy --Textbooks.
<br/><br/><label>LC Class. No.: </label>QB43.3  / UND 2015