Ritter, Gordon. <br/><br/>
Planets, stars, and galaxies / 
Gordon Ritter. 
 - New York :  Chelsea House,  c2008. 
 - 119 p. :  ill. (some col.) ;  25 cm. 
 - Physics in action .
<br/><br/>Includes bibliographical references (p. 109-111) and index. 
<br/><br/>The universe (and welcome to it!) -- The mathematics of motion -- Newton, Kepler, and gravity -- Observing the night sky -- Relativity and black holes -- The large-scale structure of the universe. 
<br/><br/><label>ISBN: </label>9780791089330 (hardcover) 0791089339 (hardcover) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrophysics.<br/>Cosmology.
<br/><br/><label>LC Class. No.: </label>QB461  / .R48 2008 
<br/><br/><label>Dewey Class. No.: </label>523.1  / RIT 2008