| 1 | active galactic nucleus | AGN | 317 | 31 | 1.001486 | 9812177,9812251,etc |
| 2 | spectral energy distribution | SED | 321 | 26 | 1.002915 | 9812420,9812419,etc |
| 3 | cold dark matter | CDM | 248 | 18 | 1.002314 | 9812009,9812328,etc |
| 4 | point spread function | PSF | 162 | 16 | 2.001603 | 9812105,9812359,etc |
| 5 | interstellar medium | ISM | 112 | 16 | 1.002175 | 9812067,9812090,etc |
| 6 | initial mass function | IMF | 188 | 15 | 2.003044 | 9812315,9812245,etc |
| 7 | cosmic microwave background | CMB | 193 | 15 | 2.003028 | 9812125,9812200,etc |
| 8 | luminosity function | LF | 170 | 13 | 1.0028 | 9812326,9812278,etc |
| 9 | star formation rate | SFR | 91 | 13 | 1.00226 | 9812315,9812378,etc |
| 10 | hubble space telescope | HST | 84 | 13 | 1.00101 | 9812172,9812372,etc |
| 11 | nasa/ipac extragalactic database | NED | 16 | 13 | 1.000159 | 9812110,9812415,etc |
| 12 | wolf rayet | WR | 364 | 9 | 2.007597 | 9812410,9812357,etc |
| 13 | color magnitude diagram | CMD | 117 | 9 | 2.001839 | 9812326,9812168,etc |
| 14 | proportional counter array | PCA | 73 | 9 | 1.002038 | 9812358,9812160,etc |
| 15 | all sky monitor | ASM | 37 | 8 | 1.000683 | 9812420,9812358,etc |
| 16 | hubble deep field | HDF | 109 | 8 | 2.00184 | 9812105,9812172,etc |
| 17 | asymptotic giant branch | AGB | 79 | 8 | 1.00118 | 9812279,9812343,etc |
| 18 | large magellanic cloud | LMC | 157 | 8 | 2.003122 | 9812252,9812112,etc |
| 19 | sloan digital sky survey | SDSS | 52 | 8 | 2.005214 | 9812280,9812129,etc |
| 20 | far infrared | FIR | 153 | 8 | 1.00302 | 9812371,9812224,etc |
| 21 | rossi x ray timing explorer | RXTE | 86 | 8 | 1.003389 | 9812442,9812210,etc |
| 22 | gamma ray burst | GRB | 241 | 7 | 2.007451 | 9812393,9812332,etc |
| 23 | supernova remnant | SNR | 111 | 7 | 2.003636 | 9812458,9812264,etc |
| 24 | infrared space observatory | ISO | 142 | 7 | 2.001766 | 9812171,9812256,etc |
| 25 | intergalactic medium | IGM | 45 | 7 | 1.000775 | 9812125,9812087,etc |
| 26 | tully fisher | TF | 194 | 6 | 2.001951 | 9812020,9812275,etc |
| 27 | full width at half maximum | FWHM | 51 | 6 | 2.000818 | 9812105,9812190,etc |
| 28 | dark matter | DM | 140 | 6 | 2.004852 | 9812417,9812377,etc |
| 29 | intracluster medium | ICM | 102 | 6 | 2.00261 | 9812458,9812378,etc |
| 30 | low surface brightness | LSB | 96 | 6 | 2.006318 | 9812241,9812033,etc |
| 31 | high resolution imager | HRI | 93 | 6 | 1.002129 | 9812245,9812217,etc |
| 32 | very large array | VLA | 33 | 6 | 2.000682 | 9812251,9812183,etc |
| 33 | small magellanic cloud | SMC | 140 | 6 | 2.004483 | 9812460,9812045,etc |
| 34 | red giant branch | RGB | 103 | 6 | 2.005711 | 9812278,9812266,etc |
| 35 | horizontal branch | HB | 236 | 6 | 2.002457 | 9812266,9812323,etc |
| 36 | new technology telescope | NTT | 19 | 5 | 1.000446 | 9812105,9812190,etc |
| 37 | equivalent width | EW | 18 | 5 | 1.000643 | 9812410,9812160,etc |
| 38 | globular cluster | GC | 239 | 5 | 2.010188 | 9812326,9812019,etc |
| 39 | planetary nebula | PN | 329 | 5 | 2.007416 | 9812279,9812169,etc |
| 40 | giant molecular cloud | GMC | 15 | 5 | 1.000744 | 9812320,9812245,etc |
| 41 | ultraviolet | UV | 81 | 5 | 2.001536 | 9812432,9812371,etc |
| 42 | inverse compton | IC | 97 | 5 | 2.003743 | 9812458,9812148,etc |
| 43 | particle mesh | PM | 18 | 5 | 1.000224 | 9812241,9812129,etc |
| 44 | compton gamma ray observatory | CGRO | 13 | 5 | 1.000362 | 9812307,9812475,etc |
| 45 | equation of state | EOS | 34 | 5 | 1.000984 | 9812207,9812058,etc |
| 46 | burst and transient source experiment | BATSE | 40 | 5 | 1.001256 | 9812160,9812475,etc |
| 47 | quasi periodic oscillation | QPO | 224 | 5 | 2.005868 | 9812308,9812180,etc |
| 48 | luminous blue variable | LBV | 17 | 4 | 1.001295 | 9812279,9812038,etc |
| 49 | lyman break galaxy | LBG | 97 | 4 | 2.003338 | 9812167,9812241,etc |
| 50 | infrared | IR | 99 | 4 | 2.00371 | 9812049,9812234,etc |
| 51 | local thermodynamic equilibrium | LTE | 37 | 4 | 1.001547 | 9812049,9812181,etc |
| 52 | quasi periodic oscillations | QPO | 92 | 4 | 2.002407 | 9812358,9812161,etc |
| 53 | cam interactive analysis | CIA | 6 | 4 | 1.000349 | 9812090,9812476,etc |
| 54 | cosmic ray | CR | 97 | 4 | 2.003357 | 9812458,9812445,etc |
| 55 | extreme ultraviolet | EUV | 39 | 4 | 1.001804 | 9812458,9812080,etc |
| 56 | canada france hawaii telescope | CFHT | 22 | 4 | 2.001006 | 9812172,9812396,etc |
| 57 | position sensitive proportional counter | PSPC | 50 | 4 | 2.001041 | 9812245,9812089,etc |
| 58 | supernova remnants | SNR | 33 | 4 | 1.001038 | 9812217,9812260,etc |
| 59 | low mass x ray binary | LMXB | 25 | 4 | 2.001293 | 9812343,9812440,etc |
| 60 | high energy x ray timing experiment | HEXTE | 41 | 4 | 1.002008 | 9812160,9812210,etc |
| 61 | large scale structure | LSS | 35 | 4 | 2.003035 | 9812200,9812377,etc |
| 62 | ultraluminous infrared galaxy | ULIRG | 90 | 4 | 2.001517 | 9812110,9812415,etc |
| 63 | rosat all sky survey | RASS | 127 | 4 | 2.002622 | 9812455,9812436,etc |
| 64 | advection dominated accretion flow | ADAF | 52 | 4 | 2.00346 | 9812134,9812050,etc |
| 65 | sunyaev zel'dovich | SZ | 53 | 4 | 2.004487 | 9812377,9812237,etc |
| 66 | local group | LG | 113 | 4 | 2.005066 | 9812275,9812443,etc |
| 67 | fast fourier transform | FFT | 12 | 4 | 1.000348 | 9812137,9812002,etc |
| 68 | black hole candidate | BHC | 43 | 4 | 2.001279 | 9812308,9812180,etc |
| 69 | mass to light ratio | M/L | 26 | 3 | 2.001581 | 9812020,9812172,etc |
| 70 | hubble deep field south | HDF-S | 24 | 3 | 1.000399 | 9812105,9812190,etc |
| 71 | white dwarf | WD | 50 | 3 | 2.002494 | 9812404,9812471,etc |
| 72 | mass function | MF | 60 | 3 | 2.00403 | 9812326,9812321,etc |
| 73 | intra cluster medium | ICM | 12 | 3 | 1.000382 | 9812417,9812394,etc |
| 74 | united kingdom infrared telescope | UKIRT | 17 | 3 | 1.000368 | 9812279,9812289,etc |
| 75 | position angle | PA | 23 | 3 | 2.000385 | 9812279,9812218,etc |
| 76 | black hole | BH | 48 | 3 | 2.006137 | 9812118,9812332,etc |
| 77 | supernova | SN | 151 | 3 | 2.012086 | 9812067,9812458,etc |
| 78 | proportional counter units | PCU | 8 | 3 | 1.000537 | 9812358,9812160,etc |
| 79 | luminous infrared galaxy | LIG | 90 | 3 | 2.00607 | 9812320,9812459,etc |
| 80 | particle physics and astronomy research council | PPARC | 4 | 3 | 1.000049 | 9812177,9812183,etc |
| 81 | x ray luminosity function | XLF | 45 | 3 | 2.006113 | 9812307,9812394,etc |
| 82 | signal to noise ratio | SNR | 10 | 3 | 2.000081 | 9812056,9812110,etc |
| 83 | cosmic microwave background radiation | CMBR | 16 | 3 | 1.002037 | 9812376,9812148,etc |
| 84 | westerbork synthesis radio telescope | WSRT | 5 | 3 | 1.000138 | 9812164,9812413,etc |
| 85 | near infrared | NIR | 33 | 3 | 2.001468 | 9812371,9812275,etc |
| 86 | canada france redshift survey | CFRS | 27 | 3 | 1.000293 | 9812104,9812206,etc |
| 87 | low resolution imaging spectrometer | LRIS | 11 | 3 | 2.000876 | 9812110,9812218,etc |
| 88 | singular isothermal sphere | SIS | 13 | 3 | 1.000948 | 9812415,9812273,etc |
| 89 | positional sensitive proportional counter | PSPC | 105 | 3 | 2.002339 | 9812455,9812436,etc |
| 90 | big bang nucleosynthesis | BBN | 22 | 3 | 2.004186 | 9812232,9812288,etc |
| 91 | x ray background | XRB | 84 | 3 | 2.004074 | 9812134,9812441,etc |
| 92 | dwarf spheroidal galaxy | dSph | 67 | 3 | 1.003708 | 9812266,9812443,etc |
| 93 | wide field planetary camera 2 | WFPC2 | 9 | 3 | 1.00016 | 9812266,9812272,etc |
| 94 | european southern observatory | ESO | 9 | 3 | 1.000268 | 9812440,9812045,etc |
| 95 | faint object spectrograph | FOS | 23 | 3 | 1.000548 | 9812265,9812364,etc |
| 96 | period luminosity | PL | 79 | 3 | 2.009614 | 9812437,9812074,etc |
| 97 | signal to noise | S/N | 11 | 3 | 2.00029 | 9812321,9812296,etc |