| 1 | active galactic nucleus | AGN | 503 | 32 | 1.005619 | 0005383,0005256,etc |
| 2 | spectral energy distribution | SED | 208 | 28 | 2.001456 | 0005478,0005605,etc |
| 3 | point spread function | PSF | 124 | 23 | 2.000687 | 0005592,0005403,etc |
| 4 | cosmic microwave background | CMB | 300 | 22 | 2.003449 | 0005410,0005406,etc |
| 5 | cold dark matter | CDM | 390 | 22 | 2.004244 | 0005260,0005095,etc |
| 6 | interstellar medium | ISM | 285 | 20 | 1.002054 | 0005198,0005179,etc |
| 7 | nasa/ipac extragalactic database | NED | 23 | 18 | 1.000097 | 0005209,0005545,etc |
| 8 | initial mass function | IMF | 419 | 17 | 2.004234 | 0005198,0005527,etc |
| 9 | star formation rate | SFR | 269 | 16 | 1.00304 | 0005234,0005179,etc |
| 10 | gamma ray burst | GRB | 873 | 15 | 2.008929 | 0005379,0005071,etc |
| 11 | equivalent width | EW | 152 | 15 | 1.002045 | 0005270,0005058,etc |
| 12 | hubble space telescope | HST | 81 | 12 | 2.000951 | 0005367,0005305,etc |
| 13 | broad line region | BLR | 89 | 12 | 2.001553 | 0005143,0005138,etc |
| 14 | narrow line seyfert 1 galaxy | NLS1 | 242 | 11 | 2.005655 | 0005132,0005126,etc |
| 15 | far infrared | FIR | 267 | 11 | 2.00274 | 0005198,0005605,etc |
| 16 | supernova remnant | SNR | 157 | 11 | 2.003782 | 0005407,0005548,etc |
| 17 | advection dominated accretion flow | ADAF | 157 | 11 | 1.002443 | 0005599,0005119,etc |
| 18 | infrared space observatory | ISO | 221 | 10 | 2.001589 | 0005198,0005152,etc |
| 19 | narrow line seyfert 1 | NLS1 | 180 | 10 | 2.004923 | 0005166,0005605,etc |
| 20 | intergalactic medium | IGM | 114 | 10 | 1.002036 | 0005448,0005097,etc |
| 21 | near infrared | NIR | 118 | 10 | 2.003192 | 0005266,0005609,etc |
| 22 | sloan digital sky survey | SDSS | 117 | 9 | 1.004329 | 0005247,0005515,etc |
| 23 | supernova | SN | 523 | 9 | 2.008312 | 0005105,0005443,etc |
| 24 | high resolution imager | HRI | 137 | 9 | 1.001391 | 0005605,0005256,etc |
| 25 | asymptotic giant branch | AGB | 60 | 8 | 1.002575 | 0005356,0005305,etc |
| 26 | luminosity function | LF | 252 | 8 | 1.005524 | 0005305,0005590,etc |
| 27 | full width at half maximum | FWHM | 35 | 8 | 1.00171 | 0005305,0005605,etc |
| 28 | rossi x ray timing explorer | RXTE | 52 | 8 | 2.003002 | 0005136,0005379,etc |
| 29 | very large array | VLA | 74 | 8 | 2.000961 | 0005379,0005526,etc |
| 30 | ultraviolet | UV | 228 | 8 | 2.011343 | 0005545,0005068,etc |
| 31 | red giant branch | RGB | 113 | 7 | 1.002359 | 0005356,0005595,etc |
| 32 | big bang nucleosynthesis | BBN | 113 | 7 | 1.003055 | 0005410,0005114,etc |
| 33 | infrared | IR | 322 | 7 | 2.005215 | 0005305,0005391,etc |
| 34 | large magellanic cloud | LMC | 170 | 7 | 2.00502 | 0005305,0005459,etc |
| 35 | position sensitive proportional counter | PSPC | 116 | 7 | 1.002533 | 0005605,0005491,etc |
| 36 | low surface brightness | LSB | 161 | 7 | 2.004564 | 0005231,0005210,etc |
| 37 | field of view | FOV | 59 | 7 | 2.002673 | 0005272,0005472,etc |
| 38 | low mass x ray binary | LMXB | 91 | 7 | 1.003148 | 0005497,0005496,etc |
| 39 | signal to noise | S/N | 48 | 7 | 1.000488 | 0005609,0005049,etc |
| 40 | equation of state | EOS | 115 | 7 | 1.002297 | 0005301,0005490,etc |
| 41 | wolf rayet | WR | 91 | 6 | 2.006563 | 0005056,0005179,etc |
| 42 | color magnitude diagram | CMD | 52 | 6 | 2.000871 | 0005305,0005583,etc |
| 43 | next generation space telescope | NGST | 42 | 6 | 1.001266 | 0005403,0005205,etc |
| 44 | proportional counter array | PCA | 68 | 6 | 2.001059 | 0005398,0005489,etc |
| 45 | white dwarf | WD | 130 | 6 | 1.004553 | 0005527,0005393,etc |
| 46 | dark matter | DM | 124 | 6 | 2.001927 | 0005323,0005332,etc |
| 47 | inverse compton | IC | 60 | 6 | 2.002033 | 0005066,0005444,etc |
| 48 | all sky monitor | ASM | 61 | 6 | 1.001897 | 0005066,0005489,etc |
| 49 | digitized sky survey | DSS | 18 | 6 | 1.000232 | 0005242,0005083,etc |
| 50 | ultraluminous infrared galaxy | ULIG | 150 | 6 | 2.002809 | 0005552,0005354,etc |
| 51 | signal to noise ratio | S/N | 34 | 5 | 1.000663 | 0005592,0005551,etc |
| 52 | space telescope imaging spectrograph | STIS | 18 | 5 | 2.000842 | 0005367,0005398,etc |
| 53 | small magellanic cloud | SMC | 126 | 5 | 2.003137 | 0005305,0005215,etc |
| 54 | broad absorption line | BAL | 41 | 5 | 2.004377 | 0005448,0005373,etc |
| 55 | horizontal branch | HB | 38 | 5 | 1.001704 | 0005562,0005589,etc |
| 56 | neutron star | NS | 105 | 5 | 2.001742 | 0005497,0005548,etc |
| 57 | cosmic microwave background radiation | CMBR | 52 | 5 | 2.002807 | 0005261,0005069,etc |
| 58 | standard cold dark matter | SCDM | 7 | 5 | 1.000384 | 0005246,0005022,etc |
| 59 | rosat all sky survey | RASS | 30 | 5 | 1.002813 | 0005167,0005157,etc |
| 60 | main sequence | MS | 70 | 5 | 2.001983 | 0005535,0005073,etc |
| 61 | intracluster medium | ICM | 60 | 5 | 2.002636 | 0005444,0005343,etc |
| 62 | full width half maximum | FWHM | 19 | 5 | 1.000364 | 0005049,0005032,etc |
| 63 | anomalous x ray pulsar | AXP | 177 | 5 | 2.00718 | 0005211,0005492,etc |
| 64 | very long baseline interferometry | VLBI | 29 | 4 | 1.001099 | 0005551,0005602,etc |
| 65 | faint object spectrograph | FOS | 119 | 4 | 1.002855 | 0005530,0005585,etc |
| 66 | cosmic ray | CR | 68 | 4 | 2.007568 | 0005530,0005444,etc |
| 67 | narrow line region | NLR | 40 | 4 | 2.004547 | 0005385,0005166,etc |
| 68 | young stellar object | YSO | 34 | 4 | 2.001897 | 0005522,0005463,etc |
| 69 | australia telescope compact array | ATCA | 26 | 4 | 2.001272 | 0005407,0005473,etc |
| 70 | compact steep spectrum | CSS | 73 | 4 | 2.001685 | 0005240,0005035,etc |
| 71 | far ultraviolet | FUV | 56 | 4 | 1.005913 | 0005562,0005266,etc |
| 72 | particle mesh | PM | 73 | 4 | 2.003007 | 0005095,0005502,etc |
| 73 | proportional counter unit | PCU | 36 | 4 | 1.000305 | 0005497,0005496,etc |
| 74 | planetary nebula | PN | 220 | 4 | 1.004302 | 0005086,0005527,etc |
| 75 | kolmogorov smirnov | K-S | 7 | 4 | 1.000131 | 0005086,0005492,etc |
| 76 | adaptive optics | AO | 25 | 4 | 1.000519 | 0005217,0005424,etc |
| 77 | x ray background | XRB | 52 | 4 | 2.00695 | 0005270,0005590,etc |
| 78 | soft gamma ray repeater | SGR | 162 | 4 | 2.009363 | 0005472,0005211,etc |
| 79 | zero age main sequence | ZAMS | 26 | 4 | 1.000252 | 0005110,0005029,etc |
| 80 | local thermodynamic equilibrium | LTE | 13 | 4 | 1.000248 | 0005317,0005102,etc |
| 81 | narrow line seyfert 1 galaxies | NLSy1 | 107 | 4 | 2.009123 | 0005567,0005155,etc |
| 82 | high velocity cloud | HVC | 84 | 4 | 2.006619 | 0005014,0005012,etc |
| 83 | mid infrared | MIR | 166 | 4 | 2.007744 | 0005377,0005376,etc |
| 84 | large scale structure | LSS | 24 | 4 | 1.001799 | 0005004,0005543,etc |
| 85 | synchrotron self compton | SSC | 16 | 4 | 2.000385 | 0005255,0005263,etc |
| 86 | hubble deep field | HDF | 12 | 4 | 1.000626 | 0005554,0005325,etc |
| 87 | probability distribution function | PDF | 29 | 3 | 2.000879 | 0005558,0005095,etc |
| 88 | tully fisher | TF | 18 | 3 | 2.001229 | 0005450,0005484,etc |
| 89 | star formation | SF | 26 | 3 | 2.005359 | 0005198,0005527,etc |
| 90 | ministry for university and research | MURST | 3 | 3 | 1.000306 | 0005126,0005436,etc |
| 91 | single stellar population | SSP | 20 | 3 | 2.000204 | 0005353,0005562,etc |
| 92 | south atlantic anomaly | SAA | 5 | 3 | 1.000284 | 0005531,0005452,etc |
| 93 | nuclear statistical equilibrium | NSE | 7 | 3 | 1.000543 | 0005366,0005179,etc |
| 94 | compton gamma ray observatory | CGRO | 14 | 3 | 2.000329 | 0005379,0005537,etc |
| 95 | spherical overdensity | SO | 16 | 3 | 1.00056 | 0005260,0005358,etc |
| 96 | deep survey | DS | 22 | 3 | 1.000679 | 0005062,0005398,etc |
| 97 | westerbork northern sky survey | WENSS | 70 | 3 | 2.007011 | 0005256,0005491,etc |
| 98 | chandra x ray observatory | CXO | 10 | 3 | 2.00054 | 0005154,0005227,etc |
| 99 | james clerk maxwell telescope | JCMT | 35 | 3 | 1.001683 | 0005234,0005360,etc |
| 100 | cam interactive analysis | CIA | 7 | 3 | 1.000127 | 0005272,0005083,etc |
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