| 1 | active galactic nucleus | AGN | 173 | 23 | 1.001675 | 9902205,9902193,etc |
| 2 | point spread function | PSF | 167 | 18 | 2.000922 | 9902035,9902254,etc |
| 3 | spectral energy distribution | SED | 204 | 18 | 1.002532 | 9902219,9902050,etc |
| 4 | cosmic microwave background | CMB | 266 | 16 | 1.002613 | 9902103,9902047,etc |
| 5 | star formation rate | SFR | 285 | 14 | 2.003643 | 9902148,9902086,etc |
| 6 | interstellar medium | ISM | 173 | 14 | 2.001329 | 9902281,9902282,etc |
| 7 | initial mass function | IMF | 175 | 14 | 2.001058 | 9902381,9902219,etc |
| 8 | nasa/ipac extragalactic database | NED | 19 | 12 | 1.000116 | 9902219,9902231,etc |
| 9 | luminosity function | LF | 588 | 11 | 2.005462 | 9902249,9902202,etc |
| 10 | large magellanic cloud | LMC | 282 | 10 | 2.002943 | 9902086,9902284,etc |
| 11 | intergalactic medium | IGM | 145 | 7 | 2.004593 | 9902180,9902384,etc |
| 12 | hubble space telescope | HST | 84 | 7 | 2.0021 | 9902233,9902339,etc |
| 13 | cold dark matter | CDM | 105 | 7 | 2.0015 | 9902384,9902350,etc |
| 14 | main sequence | MS | 145 | 7 | 2.001409 | 9902170,9902303,etc |
| 15 | color magnitude diagram | CMD | 175 | 7 | 1.003355 | 9902211,9902381,etc |
| 16 | very large array | VLA | 43 | 7 | 1.000757 | 9902276,9902368,etc |
| 17 | far infrared | FIR | 74 | 6 | 2.003387 | 9902148,9902281,etc |
| 18 | equivalent width | EW | 35 | 6 | 2.000491 | 9902312,9902269,etc |
| 19 | supernova remnant | SNR | 113 | 6 | 1.005013 | 9902230,9902206,etc |
| 20 | cosmic ray | CR | 124 | 5 | 2.005252 | 9902115,9902214,etc |
| 21 | fast fourier transform | FFT | 11 | 5 | 2.000214 | 9902115,9902153,etc |
| 22 | narrow line region | NLR | 87 | 5 | 1.002101 | 9902193,9902377,etc |
| 23 | horizontal branch | HB | 37 | 5 | 1.00182 | 9902289,9902383,etc |
| 24 | rosat all sky survey | RASS | 96 | 5 | 2.003009 | 9902067,9902277,etc |
| 25 | cosmic microwave background radiation | CMBR | 32 | 5 | 1.002042 | 9902050,9902295,etc |
| 26 | hubble deep field | HDF | 28 | 5 | 2.000548 | 9902044,9902311,etc |
| 27 | kolmogorov smirnov | K-S | 8 | 5 | 1.000091 | 9902230,9902239,etc |
| 28 | gamma ray bursts | GRB | 107 | 5 | 1.004072 | 9902013,9902039,etc |
| 29 | gamma ray burst | GRB | 177 | 5 | 2.003277 | 9902196,9902306,etc |
| 30 | south atlantic anomaly | SAA | 15 | 4 | 2.000332 | 9902347,9902269,etc |
| 31 | asymptotic giant branch | AGB | 50 | 4 | 1.003084 | 9902281,9902284,etc |
| 32 | wolf rayet | WR | 34 | 4 | 2.002488 | 9902281,9902206,etc |
| 33 | infrared | IR | 87 | 4 | 2.002453 | 9902059,9902312,etc |
| 34 | low mass x ray binary | LMXB | 24 | 4 | 1.000846 | 9902383,9902319,etc |
| 35 | x ray background | XRB | 82 | 4 | 2.000947 | 9902256,9902060,etc |
| 36 | small magellanic cloud | SMC | 19 | 4 | 1.000561 | 9902219,9902043,etc |
| 37 | milky way | MW | 21 | 4 | 1.000536 | 9902219,9902284,etc |
| 38 | synchrotron self compton | SSC | 32 | 4 | 2.001018 | 9902008,9902029,etc |
| 39 | phoswich detector system | PDS | 35 | 4 | 1.000529 | 9902224,9902022,etc |
| 40 | black hole | BH | 21 | 4 | 1.000469 | 9902034,9902182,etc |
| 41 | low surface brightness | LSB | 30 | 3 | 2.001049 | 9902249,9902171,etc |
| 42 | cataclysmic variable | CV | 69 | 3 | 2.001315 | 9902149,9902150,etc |
| 43 | zero age main sequence | ZAMS | 7 | 3 | 1.000098 | 9902148,9902303,etc |
| 44 | ultraviolet | UV | 52 | 3 | 2.001785 | 9902233,9902043,etc |
| 45 | full width at half maximum | FWHM | 21 | 3 | 1.001172 | 9902253,9902254,etc |
| 46 | particle mesh | PM | 9 | 3 | 1.000178 | 9902125,9902215,etc |
| 47 | globular cluster | GC | 102 | 3 | 2.001462 | 9902086,9902164,etc |
| 48 | proportional counter array | PCA | 8 | 3 | 1.000217 | 9902383,9902319,etc |
| 49 | intracluster medium | ICM | 79 | 3 | 2.002353 | 9902366,9902277,etc |
| 50 | pure luminosity evolution | PLE | 10 | 3 | 2.000722 | 9902108,9902147,etc |
| 51 | gamma ray burst monitor | GRBM | 14 | 3 | 1.001575 | 9902013,9902096,etc |
| 52 | all sky monitor | ASM | 22 | 3 | 1.001266 | 9902008,9902319,etc |
| 53 | pre main sequence | PMS | 36 | 3 | 2.000696 | 9902114,9902318,etc |
| 54 | white dwarf | WD | 188 | 3 | 2.004446 | 9902303,9902090,etc |
| 55 | low energy concentrator spectrometer | LECS | 80 | 3 | 2.002744 | 9902224,9902329,etc |
| 56 | broad absorption line | BAL | 94 | 3 | 1.006326 | 9902371,9902081,etc |
| 57 | position sensitive proportional counter | PSPC | 42 | 3 | 2.000613 | 9902161,9902075,etc |
| 58 | weakly interacting massive particle | WIMP | 8 | 3 | 1.000183 | 9902210,9902012,etc |
| 59 | las campanas redshift survey | LCRS | 104 | 3 | 2.005956 | 9902023,9902332,etc |
| 60 | red clump | RC | 222 | 3 | 2.006531 | 9902031,9902098,etc |
| 61 | spectral energy distributions | SED | 22 | 3 | 2.001146 | 9902368,9902369,etc |
| 62 | friedmann robertson walker | FRW | 28 | 3 | 1.002099 | 9902337,9902338,etc |
| 63 | power density spectrum | PDS | 16 | 3 | 2.000795 | 9902212,9902221,etc |
| 64 | star formation rates | SFR | 8 | 3 | 1.000394 | 9902182,9902229,etc |
| 65 | sloan digital sky survey | SDSS | 159 | 3 | 2.003146 | 9902332,9902184,etc |