Astronomical observations  astronomy and the study of deep space 
edited by Erik Gregersen. 
 - New York  Britannica Educational Publishing;Rosen Educational services  2010. 
 - 214 p.  ill.  23 cm. 
 - An explorer's guide to the universe .
<br/><br/> "In association with Britannica Educational Publishing and Rosen educational Services" 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9781615300259 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy--Popular works.<br/>Astronomy instruments--Popular works<br/>Astronomy--Observations--Popular works.