| wolf rayet | WR | 403 | 10 | 2.006925 | 0208432,0208172,etc |
| inverse compton | IC | 127 | 8 | 1.002046 | 0208156,0208107,etc |
| signal to noise | S/N | 29 | 7 | 1.000471 | 0208456,0208454,etc |
| advanced ccd imaging spectrometer | ACIS | 44 | 7 | 1.00071 | 0208296,0208475,etc |
| rosat all sky survey | RASS | 29 | 6 | 2.000992 | 0208211,0208501,etc |
| nasa extragalactic database | NED | 17 | 6 | 1.000107 | 0208168,0208003,etc |
| early data release | EDR | 38 | 5 | 1.001686 | 0208211,0208454,etc |
| astrophysical research consortium | ARC | 6 | 5 | 1.000171 | 0208211,0208241,etc |
| synchrotron self compton | SSC | 102 | 4 | 2.001225 | 0208156,0208507,etc |
| max planck institute for astronomy | MPIA | 4 | 4 | 1.000102 | 0208211,0208241,etc |
| full width half maximum | FWHM | 23 | 4 | 1.000741 | 0208197,0208551,etc |
| greisen zatsepin kuzmin | GZK | 39 | 4 | 2.000488 | 0208301,0208444,etc |
| 2 micron all sky survey | 2MASS | 39 | 4 | 2.002208 | 0208337,0208433,etc |
| low surface brightness | LSB | 86 | 4 | 2.006381 | 0208260,0208252,etc |
| proportional counter array | PCA | 25 | 4 | 1.000374 | 0208158,0208367,etc |
| proportional counter unit | PCU | 11 | 4 | 1.000382 | 0208158,0208367,etc |
| power density spectrum | PDS | 24 | 4 | 1.006108 | 0208131,0208130,etc |
| goddard high resolution spectrograph | GHRS | 18 | 4 | 1.000579 | 0208478,0208213,etc |
| space telescope imaging spectrograph | STIS | 35 | 4 | 2.002516 | 0208072,0208214,etc |
| all sky monitor | ASM | 15 | 3 | 2.000861 | 0208396,0208179,etc |
| rayleigh taylor | RT | 10 | 3 | 1.000634 | 0208156,0208483,etc |
| x ray luminosity function | XLF | 16 | 3 | 2.000167 | 0208468,0208475,etc |
| berkeley illinois maryland association | BIMA | 68 | 3 | 2.002544 | 0208005,0208467,etc |
| friends of friends | FoF | 31 | 3 | 1.000719 | 0208168,0208041,etc |
| non equilibrium ionization | NEI | 11 | 3 | 1.000357 | 0208013,0208116,etc |
| hertzsprung russell | HR | 13 | 3 | 1.000636 | 0208172,0208431,etc |
| integrated sachs wolfe | ISW | 17 | 3 | 2.000367 | 0208032,0208567,etc |
| colour magnitude diagram | CMD | 11 | 3 | 1.002245 | 0208337,0208057,etc |
| center for astrophysics | CfA | 11 | 3 | 1.000099 | 0208425,0208257,etc |
| landau pomeranchuk migdal | LPM | 13 | 3 | 1.000648 | 0208507,0208228,etc |
| star formation history | SFR | 16 | 3 | 2.000364 | 0208057,0208162,etc |
| black hole candidate | BHC | 7 | 3 | 1.001015 | 0208296,0208084,etc |
| dwarf irregular | dIrr | 19 | 3 | 2.000174 | 0208260,0208422,etc |
| monte carlo | MC | 31 | 3 | 2.000833 | 0208011,0208503,etc |
| high resolution camera | HRC | 101 | 3 | 2.002592 | 0208475,0208474,etc |
| unidentified infrared band | UIB | 13 | 3 | 1.00019 | 0208119,0208412,etc |
| friedmann robertson walker | FRW | 13 | 3 | 1.000774 | 0208103,0208222,etc |
| wide field camera | WFC | 5 | 3 | 1.000381 | 0208003,0208033,etc |
| wide field planetary camera 2 | WFPC2 | 9 | 3 | 1.000209 | 0208284,0208008,etc |
| reflection grating spectrometer | RGS | 25 | 3 | 1.001728 | 0208090,0208166,etc |
| uk astrophysical fluids facility | UKAFF | 3 | 3 | 1.000033 | 0208527,0208293,etc |
| compact steep spectrum | CSS | 4 | 3 | 1.000137 | 0208548,0208390,etc |
| accretion ejection instability | AEI | 14 | 3 | 1.002268 | 0208092,0208472,etc |