| 1 | active galactic nucleus | AGN | 419 | 18 | 1.004068 | 9704035,9704003,etc |
| 2 | cosmic microwave background | CMB | 156 | 13 | 2.001452 | 9704231,9704261,etc |
| 3 | cold dark matter | CDM | 183 | 10 | 2.003196 | 9704246,9704133,etc |
| 4 | large magellanic cloud | LMC | 161 | 8 | 1.004265 | 9704179,9704295,etc |
| 5 | nasa/ipac extragalactic database | NED | 12 | 7 | 1.000106 | 9704112,9704001,etc |
| 6 | horizontal branch | HB | 409 | 7 | 1.00309 | 9704150,9704229,etc |
| 7 | interstellar medium | ISM | 50 | 7 | 1.000942 | 9704008,9704279,etc |
| 8 | full width at half maximum | FWHM | 51 | 6 | 2.000529 | 9704059,9704273,etc |
| 9 | asymptotic giant branch | AGB | 208 | 6 | 1.00527 | 9704172,9704201,etc |
| 10 | gamma ray burst | GRB | 172 | 6 | 2.004703 | 9704268,9704278,etc |
| 11 | initial mass function | IMF | 48 | 6 | 2.000494 | 9704133,9704077,etc |
| 12 | signal to noise | S/N | 20 | 5 | 1.000515 | 9704220,9704059,etc |
| 13 | supernova remnant | SNR | 126 | 5 | 2.003218 | 9704137,9704008,etc |
| 14 | cosmic background radiation | CBR | 105 | 5 | 2.001206 | 9704040,9704287,etc |
| 15 | main sequence | MS | 118 | 5 | 2.001766 | 9704150,9704058,etc |
| 16 | globular cluster | GC | 229 | 5 | 2.006567 | 9704150,9704157,etc |
| 17 | low mass x ray binary | LMXB | 24 | 5 | 2.001103 | 9704229,9704200,etc |
| 18 | compton gamma ray observatory | CGRO | 11 | 5 | 1.000409 | 9704152,9704207,etc |
| 19 | x ray background | XRB | 106 | 4 | 1.002412 | 9704117,9704147,etc |
| 20 | point spread function | PSF | 42 | 4 | 1.000712 | 9704117,9704282,etc |
| 21 | planetary nebula | PN | 62 | 4 | 1.003321 | 9704172,9704201,etc |
| 22 | hubble space telescope | HST | 67 | 4 | 2.002765 | 9704179,9704012,etc |
| 23 | luminosity function | LF | 97 | 4 | 2.001984 | 9704212,9704291,etc |
| 24 | intergalactic medium | IGM | 19 | 4 | 1.000742 | 9704291,9704184,etc |
| 25 | lyman continuum | Lyc | 59 | 4 | 1.005627 | 9704291,9704256,etc |
| 26 | hubble deep field | HDF | 42 | 4 | 2.003048 | 9704012,9704077,etc |
| 27 | kolmogorov smirnov | K-S | 22 | 4 | 2.000317 | 9704100,9704289,etc |
| 28 | ultraviolet | UV | 212 | 4 | 2.00093 | 9704278,9704077,etc |
| 29 | position sensitive proportional counter | PSPC | 54 | 4 | 2.001015 | 9704008,9704065,etc |
| 30 | dwarf irregular | dIrr | 40 | 4 | 2.000232 | 9704031,9704104,etc |
| 31 | spectral energy distribution | SED | 80 | 4 | 1.002039 | 9704262,9704126,etc |
| 32 | signal to noise ratio | SNR | 14 | 3 | 2.000108 | 9704206,9704001,etc |
| 33 | broad line region | BLR | 25 | 3 | 2.000192 | 9704035,9704112,etc |
| 34 | star formation rate | SFR | 117 | 3 | 2.004476 | 9704102,9704001,etc |
| 35 | wide field planetary camera 2 | WFPC2 | 12 | 3 | 2.004505 | 9704212,9704012,etc |
| 36 | infrared | IR | 155 | 3 | 2.005871 | 9704100,9704201,etc |
| 37 | broad absorption line | BAL | 51 | 3 | 2.002266 | 9704234,9704249,etc |
| 38 | quasi periodic oscillation | QPO | 109 | 3 | 2.012208 | 9704229,9704200,etc |
| 39 | south atlantic anomaly | SAA | 5 | 3 | 1.000041 | 9704229,9704297,etc |
| 40 | ultraviolet imaging telescope | UIT | 163 | 3 | 2.004309 | 9704042,9704297,etc |
| 41 | signal to noise ratios | SNR | 14 | 3 | 1.000607 | 9704058,9704107,etc |
| 42 | particle mesh | PM | 28 | 3 | 2.000905 | 9704033,9704075,etc |
| 43 | red giant branch | RGB | 37 | 3 | 2.000812 | 9704227,9704238,etc |
| 44 | astronomy | ASTRON | 3 | 3 | 1.000048 | 9704200,9704272,etc |
| 45 | burst and transient source experiment | BATSE | 42 | 3 | 2.001479 | 9704264,9704244,etc |