| 1 | active galactic nucleus | AGN | 223 | 23 | 2.002424 | 9809248,9809251,etc |
| 2 | spectral energy distribution | SED | 252 | 16 | 1.00237 | 9809153,9809181,etc |
| 3 | point spread function | PSF | 167 | 13 | 1.001612 | 9809046,9809366,etc |
| 4 | interstellar medium | ISM | 83 | 13 | 1.001687 | 9809057,9809264,etc |
| 5 | initial mass function | IMF | 200 | 13 | 1.00238 | 9809302,9809105,etc |
| 6 | hubble deep field | HDF | 89 | 11 | 1.001485 | 9809390,9809181,etc |
| 7 | cosmic microwave background | CMB | 273 | 11 | 2.003396 | 9809189,9809320,etc |
| 8 | hubble space telescope | HST | 132 | 10 | 1.002843 | 9809040,9809294,etc |
| 9 | cold dark matter | CDM | 186 | 9 | 2.008504 | 9809412,9809368,etc |
| 10 | nasa/ipac extragalactic database | NED | 9 | 8 | 1.000094 | 9809046,9809366,etc |
| 11 | luminosity function | LF | 93 | 7 | 1.001549 | 9809191,9809391,etc |
| 12 | gamma ray burst | GRB | 346 | 7 | 2.007266 | 9809411,9809356,etc |
| 13 | proportional counter array | PCA | 33 | 7 | 2.001162 | 9809407,9809087,etc |
| 14 | star formation rate | SFR | 65 | 7 | 2.00044 | 9809047,9809207,etc |
| 15 | large magellanic cloud | LMC | 137 | 6 | 1.001362 | 9809387,9809313,etc |
| 16 | dark matter | DM | 199 | 6 | 2.003177 | 9809366,9809250,etc |
| 17 | signal to noise ratio | S/N | 22 | 6 | 1.000989 | 9809405,9809388,etc |
| 18 | supernova | SN | 141 | 6 | 2.008141 | 9809405,9809058,etc |
| 19 | supernova remnant | SNR | 221 | 6 | 2.003288 | 9809140,9809139,etc |
| 20 | cosmic microwave background radiation | CMBR | 33 | 6 | 2.000856 | 9809062,9809144,etc |
| 21 | cataclysmic variable | CV | 95 | 5 | 1.004429 | 9809340,9809125,etc |
| 22 | fundamental plane | FP | 177 | 5 | 2.005334 | 9809191,9809319,etc |
| 23 | synchrotron self compton | SSC | 26 | 5 | 1.000886 | 9809248,9809251,etc |
| 24 | signal to noise | S/N | 35 | 5 | 2.000518 | 9809106,9809266,etc |
| 25 | james clerk maxwell telescope | JCMT | 22 | 5 | 1.000408 | 9809120,9809121,etc |
| 26 | color magnitude diagram | CMD | 87 | 4 | 2.001175 | 9809340,9809275,etc |
| 27 | red giant branch | RGB | 105 | 4 | 2.002113 | 9809340,9809313,etc |
| 28 | horizontal branch | HB | 75 | 4 | 2.001293 | 9809340,9809112,etc |
| 29 | inverse compton | IC | 46 | 4 | 2.001308 | 9809153,9809038,etc |
| 30 | burst and transient source experiment | BATSE | 42 | 4 | 2.001113 | 9809152,9809098,etc |
| 31 | all sky monitor | ASM | 70 | 4 | 2.002917 | 9809152,9809216,etc |
| 32 | globular cluster | GC | 210 | 4 | 2.003622 | 9809405,9809047,etc |
| 33 | low mass x ray binary | LMXB | 55 | 4 | 1.001933 | 9809335,9809036,etc |
| 34 | advection dominated accretion flow | ADAF | 19 | 4 | 1.001092 | 9809250,9809094,etc |
| 35 | nordic optical telescope | NOT | 19 | 4 | 1.00013 | 9809155,9809107,etc |
| 36 | position angle | PA | 20 | 4 | 1.001013 | 9809155,9809160,etc |
| 37 | anglo australian telescope | AAT | 9 | 4 | 1.000232 | 9809206,9809180,etc |
| 38 | tully fisher | TF | 210 | 4 | 2.006588 | 9809160,9809224,etc |
| 39 | faint object spectrograph | FOS | 43 | 4 | 2.00074 | 9809042,9809290,etc |
| 40 | goddard high resolution spectrograph | GHRS | 32 | 4 | 1.00042 | 9809180,9809128,etc |
| 41 | wolf rayet | W-R | 252 | 4 | 2.007537 | 9809015,9809188,etc |
| 42 | intergalactic medium | IGM | 54 | 4 | 1.001129 | 9809149,9809223,etc |
| 43 | australia telescope compact array | ATCA | 18 | 3 | 1.001775 | 9809075,9809301,etc |
| 44 | colour magnitude diagram | CMD | 24 | 3 | 1.00198 | 9809046,9809313,etc |
| 45 | local group | LG | 28 | 3 | 1.002125 | 9809046,9809199,etc |
| 46 | double beam spectrograph | DBS | 5 | 3 | 1.000251 | 9809046,9809123,etc |
| 47 | rotation curve | RC | 116 | 3 | 2.002564 | 9809366,9809213,etc |
| 48 | rossi x ray timing explorer | RXTE | 27 | 3 | 2.000891 | 9809152,9809407,etc |
| 49 | local thermodynamic equilibrium | LTE | 8 | 3 | 2.00018 | 9809405,9809232,etc |
| 50 | quasi periodic oscillation | QPO | 126 | 3 | 2.008863 | 9809407,9809335,etc |
| 51 | asymptotic giant branch | AGB | 67 | 3 | 1.002089 | 9809338,9809128,etc |
| 52 | circumnuclear disk | CND | 64 | 3 | 1.00326 | 9809068,9809279,etc |
| 53 | giant molecular cloud | GMC | 18 | 3 | 1.000309 | 9809068,9809313,etc |
| 54 | very large array | VLA | 28 | 3 | 1.004272 | 9809068,9809270,etc |
| 55 | pre main sequence | PMS | 49 | 3 | 2.001545 | 9809117,9809254,etc |
| 56 | william herschel telescope | WHT | 6 | 3 | 1.000139 | 9809155,9809031,etc |
| 57 | main sequence | MS | 92 | 3 | 2.001744 | 9809254,9809106,etc |
| 58 | rosat eso flux limited x ray | REFLEX | 18 | 3 | 1.001148 | 9809396,9809382,etc |
| 59 | kolmogorov smirnov | K-S | 9 | 3 | 1.000191 | 9809165,9809284,etc |
| 60 | large scale structure | LSS | 44 | 3 | 1.001835 | 9809053,9809043,etc |
| 61 | fourier transform | FT | 13 | 3 | 1.000604 | 9809266,9809120,etc |
| 62 | probability distribution function | PDF | 26 | 3 | 2.001496 | 9809397,9809204,etc |
| 63 | pure luminosity evolution | PLE | 18 | 3 | 1.00055 | 9809173,9809271,etc |
| 64 | full width half maximum | FWHM | 14 | 3 | 1.000436 | 9809404,9809190,etc |
| 65 | long wavelength | LW | 57 | 3 | 2.003039 | 9809284,9809122,etc |