Moore, Patrick. <br/><br/>
The Guinness book of astronomy/ 

 - 4th ed. 
 - London  Guinness Publishing Ltd.   1992 
 - 288  p. 
<br/><br/><label>ISBN: </label>851129404 
<br/><br/><label>Dewey Class. No.: </label>REF 520 M78 1992