| proportional counter array | PCA | 55 | 7 | 2.000596 | 0308536,0308495,etc |
| signal to noise | S/N | 24 | 7 | 1.000337 | 0308150,0308048,etc |
| wide field camera | WFC | 28 | 6 | 1.000199 | 0308009,0308510,etc |
| low surface brightness | LSB | 35 | 5 | 1.001069 | 0308144,0308405,etc |
| advanced ccd imaging spectrometer | ACIS | 51 | 5 | 1.002836 | 0308024,0308332,etc |
| european photon imaging camera | EPIC | 16 | 4 | 1.000202 | 0308373,0308488,etc |
| colour magnitude diagram | CMD | 20 | 4 | 2.000562 | 0308488,0308500,etc |
| early data release | EDR | 54 | 4 | 1.002054 | 0308508,0308506,etc |
| max planck institute for astronomy | MPIA | 4 | 4 | 1.000137 | 0308508,0308443,etc |
| nasa extragalactic database | NED | 8 | 4 | 1.000156 | 0308283,0308057,etc |
| circumstellar medium | CSM | 23 | 4 | 2.000386 | 0308527,0308533,etc |
| rosat all sky survey | RASS | 25 | 4 | 1.000533 | 0308140,0308443,etc |
| ultra luminous infrared galaxy | ULIRG | 47 | 4 | 2.004653 | 0308198,0308101,etc |
| advanced camera for surveys | ACS | 108 | 4 | 2.000903 | 0308185,0308520,etc |
| kelvin helmholtz | K-H | 24 | 4 | 1.000906 | 0308390,0308203,etc |
| extreme horizontal branch | EHB | 68 | 3 | 2.006009 | 0308509,0308440,etc |
| space telescope imaging spectrograph | STIS | 5 | 3 | 1.000608 | 0308509,0308243,etc |
| back illuminated | BI | 9 | 3 | 1.000886 | 0308150,0308091,etc |
| first ionization potential | FIP | 9 | 3 | 1.000439 | 0308058,0308229,etc |
| extremely metal poor | EMP | 119 | 3 | 2.003255 | 0308016,0308029,etc |
| cerro tololo interamerican observatory | CTIO | 10 | 3 | 1.000245 | 0308488,0308034,etc |
| dwarf spheroidal | dSph | 10 | 3 | 1.000277 | 0308241,0308348,etc |
| astrophysical research consortium | ARC | 3 | 3 | 1.00014 | 0308508,0308443,etc |
| integral burst alert system | IBAS | 72 | 3 | 2.005403 | 0308173,0308346,etc |
| integral science data centre | ISDC | 70 | 3 | 2.004183 | 0308173,0308245,etc |
| inverse compton | IC | 6 | 3 | 1.000952 | 0308026,0308377,etc |
| soft gamma ray repeater | SGR | 37 | 3 | 1.00166 | 0308346,0308455,etc |
| ultra violet | UV | 144 | 3 | 2.004778 | 0308039,0308206,etc |
| kolmogorov smirnov | KS | 42 | 3 | 1.001915 | 0308257,0308278,etc |
| uk astrophysical fluids facility | UKAFF | 3 | 3 | 1.000133 | 0308351,0308360,etc |
| intra cluster medium | ICM | 31 | 3 | 2.001958 | 0308024,0308293,etc |
| berkeley illinois maryland association | BIMA | 14 | 3 | 2.000844 | 0308051,0308234,etc |
| wide field and planetary camera 2 | WFPC2 | 21 | 3 | 2.00064 | 0308050,0308306,etc |
| wide field planetary camera 2 | WFPC2 | 15 | 3 | 1.000462 | 0308384,0308306,etc |
| hertzsprung russell | H-R | 11 | 3 | 1.00008 | 0308521,0308522,etc |
| fluorescence detector | FD | 48 | 3 | 2.00462 | 0308427,0308512,etc |
| magneto hydrodynamic | MHD | 9 | 3 | 1.000574 | 0308234,0308391,etc |
| proportional counter unit | PCU | 7 | 3 | 1.00006 | 0308096,0308154,etc |
| 2 micron all sky survey | 2MASS | 14 | 3 | 1.000096 | 0308143,0308102,etc |
| ultra violet echelle spectrograph | UVES | 22 | 3 | 2.000452 | 0308078,0308151,etc |