Constellation X-Ray Observatory  unlocking the mysteries of black holes, dark matter, dark energy, and life cycles of matter in the universe. 
 Constellation X Ray Observatory 

 - [Greenbelt, Md.]  [Cambridge, Mass.]  National Aeronautics and Space Administration, Goddard Space Flight Center  Smithsonian Astrophysical Observatory  [2004] 
 - 16 p.  col. ill.  28 cm. 
<br/><br/> Cover title.  "A beyond Einstein mission."  Shipping list no.: 2004-0194-P.  "NP-2004-4-629-GSFC." 
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<br/><br/><label>Subjects--Corporate Names: </label><br/>Constellation-X Artificial satellite
<br/><br/><label>Subjects--Topical Terms: </label><br/>X-ray astronomy.<br/>Astronomical observatories--United States.
<br/><br/><label>GPO Item No.: </label>0830-I 0830-I (online) 
<br/><br/><label>Gov. Doc. Class. No.: </label>NAS 1.83:2004-4-629-GSFC 
<br/><br/><label>Report. No.: </label>NP-2004-4-629-GSFC