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| physical object > natural object > celestial body > X-ray source > Circinus X-1 | 
| Circinus X-1 (3U 1516-56)  | ||||
| subject | fact | |||
| Circinus X-1 | is a part of Circinus | ![]()  | 
| has synonym 3U 1516-56 | ![]()  | |
| has definition A highly variable X-ray source. Many of its properties are similar to those of Cygnus X-1. | ![]()  | |
| is an instance of X-ray source | ![]()  | |
| X-ray source | has wavelength X-ray | ![]()  | 
| is a part of celestial sphere | ![]()  | |
| celestial body | has spectra | ![]()  | 
| physical object | has location or center of gravity | ![]()  | 
| has angular momentum | ![]()  | |
| has mass | ![]()  | |
| has velocity | ![]()  | |
| has momentum | ![]()  | |
| has temperature | ![]()  | |
| has volume | ![]()  | |
| has extent | ![]()  | |
| has material | ![]()  | 
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