| 1 | active galactic nucleus | AGN | 265 | 19 | 2.006188 | 0003159,0003030,etc |
| 2 | nasa/ipac extragalactic database | NED | 30 | 18 | 1.000542 | 0003089,0003273,etc |
| 3 | point spread function | PSF | 182 | 17 | 1.001699 | 0003146,0003392,etc |
| 4 | initial mass function | IMF | 164 | 15 | 2.001364 | 0003380,0003345,etc |
| 5 | supernova remnant | SNR | 287 | 15 | 2.003006 | 0003345,0003026,etc |
| 6 | cold dark matter | CDM | 156 | 15 | 1.003321 | 0003400,0003289,etc |
| 7 | hubble space telescope | HST | 116 | 14 | 2.001483 | 0003247,0003203,etc |
| 8 | supernova | SN | 310 | 13 | 2.004818 | 0003345,0003026,etc |
| 9 | gamma ray burst | GRB | 614 | 13 | 1.006655 | 0003345,0003284,etc |
| 10 | star formation rate | SFR | 236 | 13 | 2.002686 | 0003161,0003006,etc |
| 11 | interstellar medium | ISM | 181 | 12 | 2.00185 | 0003211,0003345,etc |
| 12 | cosmic microwave background | CMB | 115 | 11 | 2.00281 | 0003254,0003363,etc |
| 13 | large magellanic cloud | LMC | 170 | 10 | 1.003088 | 0003380,0003392,etc |
| 14 | white dwarf | WD | 266 | 9 | 2.005117 | 0003217,0003322,etc |
| 15 | small magellanic cloud | SMC | 66 | 8 | 1.001164 | 0003380,0003392,etc |
| 16 | main sequence | MS | 132 | 8 | 2.001769 | 0003452,0003004,etc |
| 17 | spectral energy distribution | SED | 92 | 8 | 2.001783 | 0003067,0003349,etc |
| 18 | luminosity function | LF | 208 | 8 | 2.001733 | 0003061,0003392,etc |
| 19 | red giant branch | RGB | 225 | 8 | 1.006732 | 0003004,0003223,etc |
| 20 | advection dominated accretion flow | ADAF | 170 | 8 | 2.005407 | 0003016,0003176,etc |
| 21 | low mass x ray binary | LMXB | 41 | 8 | 1.000507 | 0003092,0003229,etc |
| 22 | ultraviolet | UV | 182 | 7 | 2.007339 | 0003217,0003247,etc |
| 23 | infrared space observatory | ISO | 71 | 7 | 2.002286 | 0003303,0003288,etc |
| 24 | color magnitude diagram | CMD | 106 | 7 | 1.002243 | 0003204,0003392,etc |
| 25 | kolmogorov smirnov | KS | 41 | 7 | 1.000643 | 0003349,0003402,etc |
| 26 | asymptotic giant branch | AGB | 165 | 7 | 2.004508 | 0003297,0003223,etc |
| 27 | cataclysmic variable | CV | 138 | 6 | 1.004411 | 0003217,0003452,etc |
| 28 | high resolution imager | HRI | 66 | 6 | 2.002826 | 0003217,0003405,etc |
| 29 | horizontal branch | HB | 197 | 6 | 1.009084 | 0003217,0003004,etc |
| 30 | very large array | VLA | 47 | 6 | 2.000967 | 0003089,0003016,etc |
| 31 | space telescope imaging spectrograph | STIS | 57 | 6 | 2.001243 | 0003277,0003083,etc |
| 32 | intergalactic medium | IGM | 110 | 6 | 1.003417 | 0003400,0003289,etc |
| 33 | quasi periodic oscillation | QPO | 201 | 6 | 2.009545 | 0003229,0003139,etc |
| 34 | brightest cluster galaxy | BCG | 47 | 5 | 1.004058 | 0003232,0003290,etc |
| 35 | wolf rayet | WR | 137 | 5 | 2.001991 | 0003362,0003311,etc |
| 36 | australia telescope compact array | ATCA | 58 | 5 | 1.00134 | 0003355,0003158,etc |
| 37 | equivalent width | EW | 44 | 5 | 1.003274 | 0003077,0003080,etc |
| 38 | signal to noise ratio | SNR | 35 | 4 | 1.001556 | 0003146,0003071,etc |
| 39 | polycyclic aromatic hydrocarbon | PAH | 87 | 4 | 2.003919 | 0003211,0003279,etc |
| 40 | planetary nebula | PN | 189 | 4 | 1.01195 | 0003238,0003436,etc |
| 41 | full width at half maximum | FWHM | 18 | 4 | 2.00067 | 0003238,0003085,etc |
| 42 | william herschel telescope | WHT | 34 | 4 | 1.000784 | 0003089,0003067,etc |
| 43 | far infrared | FIR | 33 | 4 | 2.000651 | 0003159,0003056,etc |
| 44 | magnetohydrodynamic | MHD | 66 | 4 | 2.0008 | 0003403,0003114,etc |
| 45 | optical transient | OT | 64 | 4 | 2.003226 | 0003257,0003429,etc |
| 46 | proportional counter array | PCA | 13 | 4 | 1.000813 | 0003405,0003251,etc |
| 47 | magnetohydrodynamics | MHD | 57 | 4 | 2.002151 | 0003420,0003157,etc |
| 48 | near infrared | NIR | 28 | 4 | 2.00268 | 0003223,0003279,etc |
| 49 | pre main sequence | PMS | 45 | 4 | 2.001035 | 0003307,0003316,etc |
| 50 | very high energy | VHE | 9 | 4 | 1.000541 | 0003157,0003025,etc |
| 51 | intracluster medium | ICM | 48 | 4 | 2.002116 | 0003085,0003104,etc |
| 52 | faint object spectrograph | FOS | 42 | 4 | 1.000861 | 0003433,0003427,etc |
| 53 | equation of state | EOS | 67 | 4 | 2.002291 | 0003472,0003401,etc |
| 54 | large scale structure | LSS | 12 | 3 | 1.000785 | 0003200,0003205,etc |
| 55 | cosmic microwave background radiation | CMBR | 16 | 3 | 2.001349 | 0003200,0003124,etc |
| 56 | very long baseline array | VLBA | 22 | 3 | 2.000272 | 0003300,0003309,etc |
| 57 | dark matter | DM | 31 | 3 | 1.002742 | 0003254,0003371,etc |
| 58 | burst and transient source experiment | BATSE | 22 | 3 | 1.000478 | 0003257,0003025,etc |
| 59 | one dimensional | 1-D | 22 | 3 | 2.001336 | 0003124,0003420,etc |
| 60 | hubble deep field | HDF | 27 | 3 | 2.001655 | 0003150,0003009,etc |
| 61 | variable star network | VSNET | 3 | 3 | 1.000213 | 0003325,0003326,etc |
| 62 | two micron all sky survey | 2MASS | 83 | 3 | 2.000429 | 0003204,0003012,etc |
| 63 | maximum likelihood | ML | 17 | 3 | 2.001784 | 0003204,0003091,etc |
| 64 | all sky monitor | ASM | 16 | 3 | 1.003807 | 0003405,0003438,etc |
| 65 | rotation measure | RM | 41 | 3 | 1.005308 | 0003076,0003260,etc |
| 66 | red supergiant | RSG | 50 | 3 | 2.002491 | 0003201,0003083,etc |
| 67 | ultraluminous infrared galaxy | ULIRG | 22 | 3 | 2.001128 | 0003030,0003196,etc |
| 68 | infrared | IR | 40 | 3 | 2.002984 | 0003030,0003025,etc |
| 69 | equivalent widths | EW | 51 | 3 | 2.002391 | 0003168,0003234,etc |
| 70 | close coupling | CC | 16 | 3 | 2.001358 | 0003411,0003410,etc |
| 71 | digitized sky survey | DSS | 15 | 3 | 2.000126 | 0003016,0003378,etc |
| 72 | sloan digital sky survey | SDSS | 18 | 3 | 2.000663 | 0003035,0003034,etc |
| 73 | circular variable filter | CVF | 5 | 3 | 1.00008 | 0003225,0003288,etc |
| 74 | unidentified infrared band | UIB | 25 | 3 | 2.001053 | 0003225,0003288,etc |
| 75 | herbig haro | HH | 187 | 3 | 2.003682 | 0003031,0003357,etc |
| 76 | short wavelength spectrometer | SWS | 43 | 3 | 2.00141 | 0003031,0003280,etc |
| 77 | high velocity cloud | HVC | 290 | 3 | 2.020019 | 0003158,0003195,etc |
| 78 | inverse compton | IC | 59 | 3 | 1.002593 | 0003157,0003182,etc |
| 79 | mid infrared | MIR | 43 | 3 | 2.004729 | 0003279,0003055,etc |
| 80 | galactic center | GC | 71 | 3 | 2.002031 | 0003285,0003057,etc |
| 81 | blue compact galaxy | BCG | 48 | 3 | 2.002405 | 0003149,0003320,etc |
| 82 | broad absorption line | BAL | 96 | 3 | 2.00198 | 0003080,0003427,etc |
| 83 | star formation history | SFH | 35 | 3 | 1.001602 | 0003451,0003109,etc |
| 84 | star formation | SF | 55 | 3 | 2.000971 | 0003371,0003320,etc |