| active galactic nucleus | AGN | 4531 | 322 | 1.528758 | 0001456,0001424,etc |
| cosmic microwave background | CMB | 3506 | 267 | 1.804742 | 0001127,0001061,etc |
| spectral energy distribution | SED | 2494 | 257 | 1.340342 | 0001399,0001069,etc |
| point spread function | PSF | 2421 | 239 | 1.257194 | 0001384,0001355,etc |
| cold dark matter | CDM | 2861 | 223 | 1.694032 | 0001219,0001061,etc |
| interstellar medium | ISM | 2479 | 222 | 1.623838 | 0001424,0001228,etc |
| nasa/ipac extragalactic database | NED | 318 | 199 | 1.055496 | 0001044,0001415,etc |
| initial mass function | IMF | 2363 | 178 | 1.845456 | 0001424,0001154,etc |
| star formation rate | SFR | 2158 | 143 | 1.667148 | 0001326,0001174,etc |
| hubble space telescope | HST | 1285 | 142 | 1.494233 | 0001154,0001092,etc |
| gamma ray burst | GRB | 5416 | 141 | 1.689164 | 0001122,0001151,etc |
| supernova remnant | SNR | 2492 | 140 | 1.711 | 0001536,0001377,etc |
| supernova | SN | 6062 | 115 | 1.896249 | 0001295,0001469,etc |
| luminosity function | LF | 1971 | 102 | 1.787104 | 0001468,0001272,etc |
| large magellanic cloud | LMC | 2328 | 92 | 1.754399 | 0001026,0001272,etc |
| low mass x ray binary | LMXB | 729 | 88 | 1.092622 | 0001026,0001437,etc |
| intergalactic medium | IGM | 1089 | 85 | 1.602393 | 0001326,0001348,etc |
| asymptotic giant branch | AGB | 1638 | 84 | 1.753541 | 0001144,0001295,etc |
| very large array | VLA | 756 | 84 | 1.667972 | 0001536,0001141,etc |
| equivalent width | EW | 997 | 84 | 1.478003 | 0001009,0001399,etc |
| color magnitude diagram | CMD | 1230 | 77 | 1.742147 | 0001468,0001272,etc |
| signal to noise ratio | S/N | 451 | 75 | 1.187605 | 0001456,0001174,etc |
| full width at half maximum | FWHM | 372 | 74 | 1.365593 | 0001212,0001260,etc |
| far infrared | far-IR | 1198 | 72 | 1.474599 | 0001384,0001424,etc |
| sloan digital sky survey | SDSS | 1071 | 70 | 1.560115 | 0001061,0001393,etc |
| quasi periodic oscillation | QPO | 2251 | 67 | 2.006646 | 0001480,0001158,etc |
| near infrared | NIR | 781 | 67 | 1.613842 | 0001173,0001270,etc |
| black hole | BH | 1565 | 66 | 1.383926 | 0001009,0001026,etc |
| red giant branch | RGB | 1376 | 66 | 1.457521 | 0001468,0001072,etc |
| infrared space observatory | ISO | 1153 | 65 | 2.001897 | 0001424,0001228,etc |
| broad line region | BLR | 516 | 64 | 1.689236 | 0001399,0001107,etc |
| advection dominated accretion flow | ADAF | 1220 | 64 | 1.566543 | 0001026,0001363,etc |
| equation of state | EOS | 927 | 63 | 1.589407 | 0001167,0001367,etc |
| infrared | IR | 2218 | 63 | 1.797975 | 0001204,0001472,etc |
| intracluster medium | ICM | 1091 | 62 | 1.744686 | 0001127,0001128,etc |
| cataclysmic variable | CV | 911 | 62 | 1.502344 | 0001065,0001525,etc |
| proportional counter array | PCA | 480 | 62 | 1.565866 | 0001158,0001110,etc |
| low surface brightness | LSB | 973 | 61 | 1.47979 | 0001071,0001249,etc |
| neutron star | NS | 1266 | 59 | 1.716818 | 0001026,0001033,etc |
| main sequence | MS | 1058 | 59 | 1.815945 | 0001468,0001295,etc |
| small magellanic cloud | SMC | 835 | 58 | 1.468575 | 0001048,0001001,etc |
| ultraviolet | UV | 1429 | 58 | 1.850565 | 0002161,0002111,etc |
| horizontal branch | HB | 1427 | 57 | 1.635556 | 0001526,0001435,etc |
| white dwarf | WD | 1306 | 55 | 1.495045 | 0001295,0001013,etc |
| high resolution imager | HRI | 675 | 54 | 1.446278 | 0001412,0001437,etc |
| signal to noise | S/N | 287 | 53 | 1.321543 | 0002062,0002195,etc |
| inverse compton | IC | 786 | 52 | 1.790984 | 0001127,0001128,etc |
| dark matter | DM | 1075 | 51 | 1.591747 | 0001219,0001147,etc |
| kolmogorov smirnov | KS | 210 | 51 | 1.098559 | 0001390,0001159,etc |
| hubble deep field | HDF | 1096 | 51 | 1.316516 | 0001096,0001271,etc |
| big bang nucleosynthesis | BBN | 794 | 50 | 1.522865 | 0001318,0001406,etc |
| australia telescope compact array | ATCA | 377 | 49 | 1.572523 | 0001158,0001413,etc |
| all sky monitor | ASM | 315 | 47 | 1.320955 | 0001437,0001530,etc |
| cosmic microwave background radiation | CMB | 423 | 47 | 1.533551 | 0001010,0001047,etc |
| space telescope imaging spectrograph | STIS | 452 | 47 | 1.895237 | 0002438,0002108,etc |
| wolf rayet | WR | 1416 | 45 | 1.848355 | 0001228,0001170,etc |
| field of view | FOV | 276 | 45 | 1.334386 | 0001437,0001047,etc |
| rossi x ray timing explorer | RXTE | 336 | 44 | 1.615459 | 0001460,0001103,etc |
| large scale structure | LSS | 260 | 43 | 1.164195 | 0001319,0001366,etc |
| planetary nebula | PN | 1716 | 41 | 1.810962 | 0001156,0001518,etc |
| young stellar object | YSO | 357 | 41 | 1.611312 | 0001214,0001336,etc |
| smoothed particle hydrodynamics | SPH | 531 | 40 | 1.526643 | 0001333,0001093,etc |
| x ray background | XRB | 522 | 38 | 1.58276 | 0001061,0001098,etc |
| position sensitive proportional counter | PSPC | 509 | 37 | 1.596232 | 0001334,0001091,etc |
| zero age main sequence | ZAMS | 219 | 37 | 1.24393 | 0001295,0001157,etc |
| local thermodynamic equilibrium | LTE | 351 | 36 | 1.196909 | 0001228,0001214,etc |
| polycyclic aromatic hydrocarbon | PAH | 891 | 36 | 1.837253 | 0001214,0001126,etc |
| star formation | SF | 736 | 35 | 1.888665 | 0001219,0001210,etc |
| digitized sky survey | DSS | 126 | 35 | 1.086215 | 0001157,0001194,etc |
| position angle | PA | 265 | 34 | 1.412819 | 0001206,0001052,etc |
| sunyaev zel'dovich | SZ | 925 | 33 | 1.913369 | 0001393,0001106,etc |
| william herschel telescope | WHT | 197 | 33 | 1.394427 | 0001092,0001212,etc |
| broad absorption line | BAL | 791 | 33 | 1.45858 | 0002108,0002199,etc |
| united kingdom infrared telescope | UKIRT | 142 | 32 | 1.094203 | 0002094,0002493,etc |
| burst and transient source experiment | BATSE | 275 | 31 | 1.58289 | 0001480,0001122,etc |
| very long baseline array | VLBA | 326 | 31 | 1.743521 | 0001022,0001543,etc |
| narrow line region | NLR | 497 | 31 | 1.744378 | 0001263,0001032,etc |
| cosmic ray | CR | 1279 | 31 | 1.778361 | 0001516,0001344,etc |
| high velocity cloud | HVC | 834 | 30 | 1.673469 | 0001016,0001142,etc |
| giant molecular cloud | GMC | 235 | 30 | 1.534094 | 0002484,0002016,etc |
| pre main sequence | PMS | 285 | 29 | 1.656624 | 0001510,0001229,etc |
| tully fisher | TF | 496 | 28 | 1.681488 | 0001219,0001147,etc |
| globular cluster | GC | 2093 | 28 | 2.009579 | 0001333,0001087,etc |
| rosat all sky survey | RASS | 481 | 27 | 1.261341 | 0001319,0001505,etc |
| magnetohydrodynamic | MHD | 501 | 27 | 1.927358 | 0001164,0001514,etc |
| james clerk maxwell telescope | JCMT | 126 | 25 | 1.000567 | 0001275,0001527,etc |
| colour magnitude diagram | CMD | 399 | 25 | 1.92136 | 0001229,0001434,etc |
| full width half maximum | FWHM | 77 | 25 | 1.000302 | 0001407,0001449,etc |
| synchrotron self compton | SSC | 231 | 25 | 1.601582 | 0002134,0002215,etc |
| ultraluminous infrared galaxy | ULIRG | 450 | 25 | 1.641921 | 0003030,0003196,etc |
| black hole candidate | BHC | 223 | 24 | 1.626315 | 0001502,0001167,etc |
| very long baseline interferometry | VLBI | 233 | 23 | 1.480225 | 0001503,0001543,etc |
| particle mesh | PM | 116 | 23 | 1.17458 | 0001099,0001347,etc |
| european southern observatory | ESO | 92 | 23 | 1.304732 | 0001428,0001227,etc |
| anglo australian telescope | AAT | 72 | 22 | 1.273222 | 0001156,0001520,etc |
| proportional counter unit | PCU | 110 | 22 | 1.09124 | 0002084,0002265,etc |
| greisen zatsepin kuzmin | GZK | 167 | 22 | 1.45519 | 0002155,0002006,etc |
| singular isothermal sphere | SIS | 141 | 22 | 1.409626 | 0006197,0006184,etc |
| probability distribution function | PDF | 352 | 21 | 1.668171 | 0001348,0001240,etc |
| lyman break galaxy | LBG | 504 | 21 | 1.766287 | 0002425,0002241,etc |
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