| 1 | cosmic microwave background | CMB | 192 | 17 | 2.002233 | 9611032,9611028,etc |
| 2 | interstellar medium | ISM | 98 | 10 | 1.001726 | 9611166,9611176,etc |
| 3 | active galactic nucleus | AGN | 88 | 10 | 2.000755 | 9611023,9611001,etc |
| 4 | point spread function | PSF | 157 | 10 | 1.001602 | 9611159,9611024,etc |
| 5 | cold dark matter | CDM | 329 | 9 | 2.002415 | 9611028,9611053,etc |
| 6 | hubble space telescope | HST | 95 | 8 | 1.001627 | 9611119,9611108,etc |
| 7 | luminosity function | LF | 98 | 6 | 2.004998 | 9611119,9611170,etc |
| 8 | globular cluster luminosity function | GCLF | 122 | 4 | 2.003665 | 9611140,9611141,etc |
| 9 | smoothed particle hydrodynamics | SPH | 98 | 4 | 2.005772 | 9611176,9611053,etc |
| 10 | intergalactic medium | IGM | 134 | 4 | 1.001501 | 9611028,9611053,etc |
| 11 | initial mass function | IMF | 84 | 4 | 2.001649 | 9611028,9611192,etc |
| 12 | nasa/ipac extragalactic database | NED | 4 | 4 | 1.000068 | 9611142,9611024,etc |
| 13 | sloan digital sky survey | SDSS | 8 | 4 | 1.000512 | 9611116,9611108,etc |
| 14 | rosat all sky survey | RASS | 28 | 4 | 2.000242 | 9611112,9611178,etc |
| 15 | hubble deep field | HDF | 42 | 4 | 2.002503 | 9611209,9611055,etc |
| 16 | horizontal branch | HB | 317 | 4 | 2.005416 | 9611066,9611016,etc |
| 17 | wide field and planetary camera 2 | WFPC2 | 39 | 3 | 2.000765 | 9611140,9611141,etc |
| 18 | surface brightness fluctuation | SBF | 12 | 3 | 1.000639 | 9611140,9611052,etc |
| 19 | wide field planetary camera 2 | WFPC-2 | 24 | 3 | 1.00138 | 9611004,9611109,etc |
| 20 | kolmogorov smirnov | K-S | 10 | 3 | 1.000148 | 9611142,9611111,etc |
| 21 | mass function | MF | 21 | 3 | 2.003659 | 9611116,9611148,etc |
| 22 | x ray binaries | XRB | 95 | 3 | 2.007282 | 9611171,9611133,etc |
| 23 | full width at half maximum | FWHM | 9 | 3 | 1.000516 | 9611003,9611045,etc |
| 24 | sunyaev zel'dovich | S-Z | 46 | 3 | 2.004002 | 9611218,9611213,etc |
| 25 | cosmic microwave background radiation | CMB | 28 | 3 | 2.002254 | 9611099,9611212,etc |
| 26 | ryle telescope | RT | 19 | 3 | 1.001343 | 9611213,9611212,etc |
| 27 | intracluster medium | ICM | 18 | 3 | 1.001394 | 9611184,9611178,etc |
| 28 | large magellanic cloud | LMC | 98 | 3 | 2.00023 | 9611136,9611128,etc |
| 29 | color magnitude diagram | CMD | 45 | 3 | 2.000797 | 9611066,9611151,etc |
| 30 | red giant branch | RGB | 92 | 3 | 2.001033 | 9611016,9611151,etc |